Solved Security Icon on Task Bar


no1yak

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Win 11 64x Pro 23H2
But of an odd one here. The security icon in the task bar vanishes when Windows loads after a cold boot or restart. It flashes for a second and then just disappears. I can restart the service by using Revo and once it's started it stays on the task bar until i reboot. I know it's a long shot but anyone have any ideas .
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
@no1yak

You should have "C:\Windows\System32\SecurityHealthSystray.exe" in your startups. Without it, the Defender can run all day without an icon in the tray. See this @Brink tutorial:

 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
@no1yak

You should have "C:\Windows\System32\SecurityHealthSystray.exe" in your startups. Without it, the Defender can run all day without an icon in the tray. See this @Brink tutorial:

@Wisewiz Yes that is there in the reg. I have checked .I know defender can run all-day without the icon being present on the task br.
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
@Wisewiz Yes that is there in the reg. I have checked .I know defender can run all-day without the icon being present on the task br.
The fact that it shows up then disappears would seem to indicate it is set at the all-user level then is disabled at the current user one.
Create a new temp user to see what happens.

Double check if it's present in this other hive as well:
This is the only place I have it in the registry. (This, of course, will affect all users)

Screenshot 2024-05-18 200152.jpeg
 

My Computers

System One System Two

  • OS
    Win11 All /Debian/Arch
    Computer type
    Laptop
    Manufacturer/Model
    ASUSTeK COMPUTER INC. TUF Gaming FX705GM
    CPU
    2.20 gigahertz Intel i7-8750H Hyper-threaded 12 cores
    Motherboard
    ASUSTeK COMPUTER INC. FX705GM 1.0
    Memory
    24428 Megabytes
    Graphics Card(s)
    Intel(R) UHD Graphics 630 / NVIDIA GeForce GTX 1060
    Sound Card
    Intel(R) Display Audio / Realtek(R) Audio
    Monitor(s) Displays
    Integrated Monitor (17.3"vis)
    Screen Resolution
    FHD 1920X1080 16:9
    Hard Drives
    2 SSD SATA/NVM Express 1.3
    WDS500G2B0A-00SM50 500.1 GB
    WDCSDAPNUW-1002 256 GB
    PSU
    19V DC 6.32 A 120 W
    Cooling
    Dual Fans
    Mouse
    MS Bluetooth
    Internet Speed
    Fiber 1GB Cox -us & ADSL Bouygues -fr
    Browser
    Edge Canary- Firefox Nightly
    Antivirus
    Windows Defender
    Other Info
    VMs of Windows 11 stable/Beta/Dev/Canary
    VM of XeroLinux- Arch based & Debian 12
  • Operating System
    Windows 11 Insider Canary
    Computer type
    Laptop
    Manufacturer/Model
    ASUS X751BP
    CPU
    AMD Dual Core A6-9220
    Motherboard
    ASUS
    Memory
    8 GB
    Graphics card(s)
    AMD Radeon R5 M420
    Sound Card
    Realtek
    Monitor(s) Displays
    17.3
    Screen Resolution
    1600X900 16:9
    Hard Drives
    1TB 5400RPM
If the reg entries in Option Four in that tutorial are present, you may also have to go back and do the enabling in Option Two, and THEN do the enabling in Option One. You need to squelch all of the systems that are snuffing out your tray icon right after your boot.
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
If the reg entries in Option Four in that tutorial are present, you may also have to go back and do the enabling in Option Two, and THEN do the enabling in Option One. You need to squelch all of the systems that are snuffing out your tray icon right after your boot.
@Wisewiz Yes done all that some time ago without any success.
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
@Wisewiz Yes done all that some time ago without any success.
If that's true, then exactly what happens when you go to "C:\Windows\System32\SecurityHealthSystray.exe" and double-click that file?
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
If that's true, then exactly what happens when you go to "C:\Windows\System32\SecurityHealthSystray.exe" and double-click that file?
@Wisewiz It puts the icon on the tray
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
Well, then, create a shortcut to that excecutable file, and put it in "C:\Users\<yourname>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup" and then reboot and see whether the icon stays in place.
If not, try putting the shortcut to that executable file in "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup" and then rebooting, and see whether the icon stays.
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
Well, then, create a shortcut to that excecutable file, and put it in "C:\Users\<yourname>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup" and then reboot and see whether the icon stays in place.
If not, try putting the shortcut to that executable file in "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup" and then rebooting, and see whether the icon stays.
Well none of your suggestions have worked. So I think I'll leave it for now. Just thought it might be any easy fix but, if it was then I wouldn't be on here asking this question.
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
Right click on start & choose powershell/terminal with admin & type/copy & paste these cmds one at a time then click Enter:
Code:
SFC /SCANNOW
DISM /Online /Cleanup-Image /StartComponentCleanup
DISM /Online /Cleanup-Image /RestoreHealth
SFC /SCANNOW
Yes the Sfc cmd is run twice.

Also I assume youโ€™ve checked under hidden icons?
 

My Computer

System One

  • OS
    Windows 11 Pro 64bit
    Computer type
    Laptop
    Manufacturer/Model
    PC Specialist Optimus VII V17-960 Gaming Laptop.
    CPU
    6th Gen Intel Core i7-6700HQ Quad Core processor.
    Memory
    16GB HyperX IMPACT 1600MHz SODIMM DDR3 (2 x 8GB)
    Graphics Card(s)
    NVIDIAยฎ GeForceยฎ GTX 960M - 2.0GB DDR5 Video RAM - DirectXยฎ 12
    Sound Card
    Intel 2 Channel High Def. Audio + SoundBlasterโ„ข Cinema 2 & Realtek
    Monitor(s) Displays
    Optimus Series: 17.3" Matte Full HD IPS LED Widescreen (1920x1080)
    Screen Resolution
    Full HD IPS display (1920 x 1080).
    Hard Drives
    4TB SSD (internal).
    1x 1TB & 1x 5TB external HDDs.
    Cooling
    STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
    Keyboard
    Logitech K800 wireless keyboard
    Mouse
    Logitech M705 wireless mouse
    Internet Speed
    Upto 100Mbps
    Browser
    Edge.
    Antivirus
    Windows Defender & MalwareBytes pro.
Right click on start & choose powershell/terminal with admin & type/copy & paste these cmds one at a time then click Enter:
Code:
SFC /SCANNOW
DISM /Online /Cleanup-Image /StartComponentCleanup
DISM /Online /Cleanup-Image /RestoreHealth
SFC /SCANNOW
Yes the Sfc cmd is run twice.

Also I assume youโ€™ve checked under hidden icons?
@Bastet Thanks for your input but, I'm way ahead of you on this one.
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
Well, if you've tried everything that @OAT and @Bastet and I have suggested, and you STILL don't have that icon staying permanently in your tray, my final advice would be to do an In-place repair install. It's quick and easy and you can keep all of your own apps and data, so you don't have to reinstall anything.

Use Option Two:
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
Thought that might be the case @no1yak.
How about: Right click taskbar>taskbar settings>Notification>turn system icons on/off?

Have you tried an in-place repair?
 

My Computer

System One

  • OS
    Windows 11 Pro 64bit
    Computer type
    Laptop
    Manufacturer/Model
    PC Specialist Optimus VII V17-960 Gaming Laptop.
    CPU
    6th Gen Intel Core i7-6700HQ Quad Core processor.
    Memory
    16GB HyperX IMPACT 1600MHz SODIMM DDR3 (2 x 8GB)
    Graphics Card(s)
    NVIDIAยฎ GeForceยฎ GTX 960M - 2.0GB DDR5 Video RAM - DirectXยฎ 12
    Sound Card
    Intel 2 Channel High Def. Audio + SoundBlasterโ„ข Cinema 2 & Realtek
    Monitor(s) Displays
    Optimus Series: 17.3" Matte Full HD IPS LED Widescreen (1920x1080)
    Screen Resolution
    Full HD IPS display (1920 x 1080).
    Hard Drives
    4TB SSD (internal).
    1x 1TB & 1x 5TB external HDDs.
    Cooling
    STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
    Keyboard
    Logitech K800 wireless keyboard
    Mouse
    Logitech M705 wireless mouse
    Internet Speed
    Upto 100Mbps
    Browser
    Edge.
    Antivirus
    Windows Defender & MalwareBytes pro.

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
Well, if you've tried everything that @OAT and @Bastet and I have suggested, and you STILL don't have that icon staying permanently in your tray, my final advice would be to do an In-place repair install. It's quick and easy and you can keep all of your own apps and data, so you don't have to reinstall anything.

Use Option Two:
@Wisewiz Been there done that and still same problem. That was the first thing I did.
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
You don't by any chance have a third-party Anti-malware program installed, do you?
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
Okay, a final thought: We've had several reports in this forum of repair installs fixing everything else that was wrong with a previous installation, but Defender was not running (or not obviously running) and didn't seem to even be present. Since it's so quick and easy, I'd try it again. I don't think that problem has persisted when those who were affected did a SECOND repair install. Worth a try?
 

My Computers

System One System Two

  • OS
    11 Pro 23H2 22631.3807
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i7-9700 @ 3.00GHz
    Motherboard
    Lenovo 3132
    Memory
    32GBDDR4 @ 2666MHz
    Graphics Card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    1 x Samsung 970 EVO PLUS 500GB NVMe SSD, 1 x WD_BLACK SN770
    250GB NVMe SSD (OS and programs), 1 x WD_BLACK SN770
    500GB NVMe SSD (Data)
    Case
    Lenovo SFF
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Mouse
    LogiTech M510 wireless
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome, sometimes Firefox
    Antivirus
    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    11 Pro 24H2 26100.712 (RP)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Lenovo ThinkCentre M920S SFF
    CPU
    i5-8400 @ 2.80GHz
    Motherboard
    Lenovo 3132
    Memory
    32GB DDR4 @ 2600MHz
    Graphics card(s)
    Intel HD 630 Graphics onboard
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x Samsung 970 EVO PLUS NVMe; 1 x Samsung 980 NVMe SSD
    Case
    Lenovo Think Centre SFF
    Mouse
    LogiTech M510 wireless
    Keyboard
    Cherry Stream TKL JK-8600US-2 Wired
    Internet Speed
    Fast (for fixed wireless!)
    Browser
    Chrome
    Antivirus
    Malwarebytes Premium and MS Defender, beautiful together
@Wisewiz Defender is running I can access Defender via settings. It works as it should, scans no problem.
 

My Computers

System One System Two

  • OS
    Win 11 64x Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 13900K
    Motherboard
    Rog Strix Z790-F
    Memory
    Corsair Vengeance DDR5 96GB
    Graphics Card(s)
    MSI RTX 3070Ti OC
    Sound Card
    Cambridge Audio DAC via onboard sound chip
    Monitor(s) Displays
    Eizo 32" FlexScan 4K / LG 43" 4K
    Screen Resolution
    3840x2160 /3840x 2160
    Hard Drives
    1x 990 Pro1TB Nvme 1x 990 Pro 2TB 1x 990 Pro 4 TB
    PSU
    Evga 750 Watt P5
    Case
    Corsair 500D
    Cooling
    Noctua D15 Cromax
    Keyboard
    Cherry G80-3000N
    Mouse
    Corsair
    Internet Speed
    500Mbps
    Browser
    Firefox x64
    Antivirus
    Defender
    Other Info
    Backup software MR ver 8 to Samsung T7
  • Operating System
    Win 11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    User Built
    CPU
    i9 9900K
    Motherboard
    Asus Hero XI
    Memory
    GSkill 3600 32GB
    Graphics card(s)
    EVA 1060
    Sound Card
    Onboard
    Monitor(s) Displays
    Eizo 32inch 4K
    Screen Resolution
    3840x2160
    Hard Drives
    Samsung 970 Evo Plus 1TB x3
    PSU
    Corsair AX750
    Case
    Corsair 400d
    Cooling
    Noctua 14s
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