Update to Windows Defender Alntimalware Platform 1.0.2303-28002-0


BrianInEngland

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Windows 11 Pro 25H2 (RP channel)
This installed this morning. Now I have the setting shown in the picture. Every time I restart I get a yellow warning triangle that LSA is disabled, I dismiss it and get the green tick again.
Also every time I check for updates AM platform 1.0.2303.27001-0 tries to install.

MS really know how to mess things up!
 

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My Computer My Computer

At a glance

Windows 11 Pro 25H2 (RP channel)AMD Ryzen 7 9800X3D 8-core64GB Corsair Titanium 6000/CL30MSI Suprim 5080 SOC
OS
Windows 11 Pro 25H2 (RP channel)
Computer type
PC/Desktop
Manufacturer/Model
MSI
CPU
AMD Ryzen 7 9800X3D 8-core
Motherboard
MEG X870E Godlike
Memory
64GB Corsair Titanium 6000/CL30
Graphics Card(s)
MSI Suprim 5080 SOC
Sound Card
Soundblaster AE-9
Monitor(s) Displays
ASUS TUF Gaming VG289Q
Screen Resolution
3840x2160
Hard Drives
Samsung 9100 Pro 4TB (gen 5 x4, system drive/games)
Samsung 990 Pro 2TB
Samsung 980 Pro 2TB
Samsung 870 Evo 4TB
Samsung 870 Evo 2TB
Samsung T9 4TB
PSU
Seasonic PX-2200
Case
Bequiet! Dark Base Pro 901
Cooling
Noctua NH-D15S Chromax black
Keyboard
Logitech G915 X (wired)
Mouse
Logitech G903 with PowerPlay charger
Internet Speed
900Mb/sec
Browser
Microsoft Edge
Antivirus
Windows Defender
Also every time I check for updates AM platform 1.0.2303.27001-0 tries to install.

Same here.
You want to keep reinstalling AV update 1.0.2303.27001.
I have never experienced as many errors as I have recently...
 

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My Computer My Computer

At a glance

Windows 11 25H2Intel Core i5-7200U8,00 GBIntel HD Graphics 620, Radeon R5 M420
OS
Windows 11 25H2
Computer type
Laptop
Manufacturer/Model
DELL VOSTRO 15 3568
CPU
Intel Core i5-7200U
Memory
8,00 GB
Graphics Card(s)
Intel HD Graphics 620, Radeon R5 M420
Sound Card
Realtek Audio ALC3246
Monitor(s) Displays
BENQ PD3205UA
Screen Resolution
1920 X 1080
Hard Drives
SK HYNIX SC311 SATA 256 GB, SanDisk Extreme 510 external
Mouse
DELL MS700
Internet Speed
50/15 MB/s VDSL
Browser
Microsoft Edge
Antivirus
Microsoft Defender
Same here.
You want to keep reinstalling AV update 1.0.2303.27001.
I have never experienced as many errors as I have recently...
I've now blocked this 'update' using the wushowhide thing
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2 (RP channel)AMD Ryzen 7 9800X3D 8-core64GB Corsair Titanium 6000/CL30MSI Suprim 5080 SOC
OS
Windows 11 Pro 25H2 (RP channel)
Computer type
PC/Desktop
Manufacturer/Model
MSI
CPU
AMD Ryzen 7 9800X3D 8-core
Motherboard
MEG X870E Godlike
Memory
64GB Corsair Titanium 6000/CL30
Graphics Card(s)
MSI Suprim 5080 SOC
Sound Card
Soundblaster AE-9
Monitor(s) Displays
ASUS TUF Gaming VG289Q
Screen Resolution
3840x2160
Hard Drives
Samsung 9100 Pro 4TB (gen 5 x4, system drive/games)
Samsung 990 Pro 2TB
Samsung 980 Pro 2TB
Samsung 870 Evo 4TB
Samsung 870 Evo 2TB
Samsung T9 4TB
PSU
Seasonic PX-2200
Case
Bequiet! Dark Base Pro 901
Cooling
Noctua NH-D15S Chromax black
Keyboard
Logitech G915 X (wired)
Mouse
Logitech G903 with PowerPlay charger
Internet Speed
900Mb/sec
Browser
Microsoft Edge
Antivirus
Windows Defender
Same here.
You want to keep reinstalling AV update 1.0.2303.27001.
I have never experienced as many errors as I have recently...
Same issue here too (tried to install 12 times already).
 

My Computer My Computer

At a glance

Windows 11 ProfessionalIntel Core i7-8700 @ 3.20GHz32GB DDR4-2666 SDRAMnVIDIA GeForce GTX 3060Ti 8GB (GA104-202 LHR)...
OS
Windows 11 Professional
Computer type
PC/Desktop
Manufacturer/Model
Dell XPS 8930
CPU
Intel Core i7-8700 @ 3.20GHz
Motherboard
Intel Z370 (Kaby Lake) Dell
Memory
32GB DDR4-2666 SDRAM
Graphics Card(s)
nVIDIA GeForce GTX 3060Ti 8GB (GA104-202 LHR) [DELL]/Intel UHD Graphics 630
Sound Card
Sound Blaster Z/Realtek Audio
Monitor(s) Displays
Dell S2721DGF IPS 27-in Gaming Monitor
Screen Resolution
2560x1440
Hard Drives
Samsung NVMe SSD 970 EVO 1TB
Samsung SATA SSD 860 EVO 1TB
PSU
SeaSonic 750W ATX PSU 80+ Gold
Case
Dell Mini-Tower
Cooling
Standard Dell Cooling
Keyboard
Razer BlackWidow V3 Mechanical Gaming Keyboard
Mouse
Razer DeathAdder V2 Gaming Mouse
Internet Speed
500 Mbps
Browser
Microsoft Edge (Chromium-Based)
Antivirus
Malwarebytes Premium and Microsoft Defender
same reinstall thing happening in my beta channel build too.
 

My Computer My Computer

At a glance

Windows 11 Pro 64bit (release preview channel)i5 840016 GB DDR4RTX 3060 Ti
OS
Windows 11 Pro 64bit (release preview channel)
Computer type
PC/Desktop
Manufacturer/Model
Asus
CPU
i5 8400
Motherboard
ROG STRIX Z370-H GAMING
Memory
16 GB DDR4
Graphics Card(s)
RTX 3060 Ti
Sound Card
On Board
Monitor(s) Displays
Acer VG242Y P
Screen Resolution
1080p
Hard Drives
Intel 660p SSD
PSU
800w
Internet Speed
1000 Mbps
same reinstall thing happening in my beta channel build too.
It seems every Security app update is more broken the last. This update is crashing more than the previous one
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2 (RP channel)AMD Ryzen 7 9800X3D 8-core64GB Corsair Titanium 6000/CL30MSI Suprim 5080 SOC
OS
Windows 11 Pro 25H2 (RP channel)
Computer type
PC/Desktop
Manufacturer/Model
MSI
CPU
AMD Ryzen 7 9800X3D 8-core
Motherboard
MEG X870E Godlike
Memory
64GB Corsair Titanium 6000/CL30
Graphics Card(s)
MSI Suprim 5080 SOC
Sound Card
Soundblaster AE-9
Monitor(s) Displays
ASUS TUF Gaming VG289Q
Screen Resolution
3840x2160
Hard Drives
Samsung 9100 Pro 4TB (gen 5 x4, system drive/games)
Samsung 990 Pro 2TB
Samsung 980 Pro 2TB
Samsung 870 Evo 4TB
Samsung 870 Evo 2TB
Samsung T9 4TB
PSU
Seasonic PX-2200
Case
Bequiet! Dark Base Pro 901
Cooling
Noctua NH-D15S Chromax black
Keyboard
Logitech G915 X (wired)
Mouse
Logitech G903 with PowerPlay charger
Internet Speed
900Mb/sec
Browser
Microsoft Edge
Antivirus
Windows Defender
Everytime I run Windows update it reinstalls.
 

My Computers My Computers

  • At a glance

    Windows11 Pro 26200.8728Intel Core i9 14900F (24 -Core, 68 MB Total C...32GB DDR5RTX 4080 Super w/581.95
    OS
    Windows11 Pro 26200.8728
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Alienware Aurora R16
    CPU
    Intel Core i9 14900F (24 -Core, 68 MB Total Cache)
    Motherboard
    Dell Alienware
    Memory
    32GB DDR5
    Graphics Card(s)
    RTX 4080 Super w/581.95
    Sound Card
    Realtec
    Monitor(s) Displays
    Corsair XENEON 32QHD165
    Screen Resolution
    2560 X 1440
    Hard Drives
    1-2TB Samsung 990 Pro PCIe NVMe M2 SSD
    1-4TB Samsung 990 Pro PCIe NVMe M2 SSD
    PSU
    1000 Watt Platinum Dell
    Case
    Alienware
    Cooling
    Liquid Closed Loop
    Keyboard
    Corsair Strafe RGB
    Mouse
    Logitech MK270 Wireless
    Internet Speed
    100Gb's Down-20 Up
    Browser
    Firefox 152.0.1
    Antivirus
    Defender
    Other Info
    Very Quiet And Fast
    CyberPower UPS CP1500PFCLCD
  • At a glance

    PClinuxOS Mate (2025.7)13th Gen Inter(R) Core(TM) i3-1315U64 GB DDR4 @3200 MHz.Internal
    Operating System
    PClinuxOS Mate (2025.7)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Intel
    CPU
    13th Gen Inter(R) Core(TM) i3-1315U
    Motherboard
    Intel
    Memory
    64 GB DDR4 @3200 MHz.
    Graphics card(s)
    Internal
    Sound Card
    None
    Monitor(s) Displays
    Dell 2419HGCF
    Screen Resolution
    1920 X 1080
    Hard Drives
    SAMSUNG 980 PRO SSD 2TB, PCIe 4.0 M.2 2280
    PSU
    Chicony 30 Watt
    Case
    Small
    Keyboard
    Dell
    Mouse
    Razor
    Internet Speed
    1GB
    Browser
    Slimjet

My Computer My Computer

At a glance

Windows 11 Pro 25H2 (RP channel)AMD Ryzen 7 9800X3D 8-core64GB Corsair Titanium 6000/CL30MSI Suprim 5080 SOC
OS
Windows 11 Pro 25H2 (RP channel)
Computer type
PC/Desktop
Manufacturer/Model
MSI
CPU
AMD Ryzen 7 9800X3D 8-core
Motherboard
MEG X870E Godlike
Memory
64GB Corsair Titanium 6000/CL30
Graphics Card(s)
MSI Suprim 5080 SOC
Sound Card
Soundblaster AE-9
Monitor(s) Displays
ASUS TUF Gaming VG289Q
Screen Resolution
3840x2160
Hard Drives
Samsung 9100 Pro 4TB (gen 5 x4, system drive/games)
Samsung 990 Pro 2TB
Samsung 980 Pro 2TB
Samsung 870 Evo 4TB
Samsung 870 Evo 2TB
Samsung T9 4TB
PSU
Seasonic PX-2200
Case
Bequiet! Dark Base Pro 901
Cooling
Noctua NH-D15S Chromax black
Keyboard
Logitech G915 X (wired)
Mouse
Logitech G903 with PowerPlay charger
Internet Speed
900Mb/sec
Browser
Microsoft Edge
Antivirus
Windows Defender
Same
 

My Computers My Computers

  • At a glance

    Windows 11 Pro x64i9 14900K P/E 5.8/4.5 GHz, cache 5.0 GHz96GB (2x48) G.skill Ripjaws 6800 MT/sAsus ROG Strix 4070 Ti OC
    OS
    Windows 11 Pro x64
    Computer type
    PC/Desktop
    Manufacturer/Model
    📷🔈🎧 🪛 DIY Photoshop/Audio/Game/tinker
    CPU
    i9 14900K P/E 5.8/4.5 GHz, cache 5.0 GHz
    Motherboard
    Asus ROG Maximus Z790 Dark Hero
    Memory
    🐏 96GB (2x48) G.skill Ripjaws 6800 MT/s
    Graphics Card(s)
    Asus ROG Strix 4070 Ti OC
    Sound Card
    🔊Bowers & Wilkins 606 S3 speakers; Audiolabs 7000a integrated amp; RSL 10S Mk2 sub; Creative Pebble Pro Minimilist
    Monitor(s) Displays
    🖥️🖥️ Eizo CG2730 ColorEdge, ViewSonic VP2768
    Screen Resolution
    🖥️🖥️ 2560 x 1440p x 2
    Hard Drives
    💾 WDC SN850X 4TB nvme, SN850 1TB nvme, SK-Hynix 2 TB P41 nvme,. Sabrent USB-C DS-SC5B 5-bay docking station: 6TB WDC Black, 6TB Ironwolf Pro; 2x 2TB WDC Black HDD
    PSU
    ⚡️ 850W Seasonic Vertex PX-850 ATX 3.0/PCI-E 5.0
    Case
    Fractal Design North XL Mesh, Black Walnut
    Cooling
    ❄️ EK Nucleus black 360 AIO w/Phanteks T30-120 fans, 2 Noctua NF-A14 Chromax case fan, 1 T30-120 fan cooling memory
    Keyboard
    ⌨️ Keychron Q3 Max TKL with custom GMK Redsuns Red Samuri keycaps, TX Stabs
    Mouse
    🖱️ Logitech G305 wireless gaming
    Internet Speed
    ⬇️ 500 Mb/s ⬆️ 12 Mb/s
    Browser
    🔥🦊 Firefox
    Antivirus
    🦺 Defender, Macrium Reflect X 🏆
    Other Info
    Phangkey Amaterasu V2 Desk Mat
  • At a glance

    Apple M1
    Computer type
    Laptop
    Manufacturer/Model
    💻 Apple 13" Macbook Pro 2020 (m1)
    CPU
    Apple M1
    Screen Resolution
    2560x1600
    Browser
    Firefox
Group Policy


I'm running Home edition, no Group Policy editor.
I'm looking for some real solution, not a cover-up.
Strangely, the "KB5007651" update is no longer found in the Microsoft Update Catalog...
 

My Computer My Computer

At a glance

Windows 11 25H2Intel Core i5-7200U8,00 GBIntel HD Graphics 620, Radeon R5 M420
OS
Windows 11 25H2
Computer type
Laptop
Manufacturer/Model
DELL VOSTRO 15 3568
CPU
Intel Core i5-7200U
Memory
8,00 GB
Graphics Card(s)
Intel HD Graphics 620, Radeon R5 M420
Sound Card
Realtek Audio ALC3246
Monitor(s) Displays
BENQ PD3205UA
Screen Resolution
1920 X 1080
Hard Drives
SK HYNIX SC311 SATA 256 GB, SanDisk Extreme 510 external
Mouse
DELL MS700
Internet Speed
50/15 MB/s VDSL
Browser
Microsoft Edge
Antivirus
Microsoft Defender
I have just updated my Defender in Windows 10 and it updated from a problematic 4.18.2303.8 to a problem-free 4.18.2304.8
WD 4.18.2304.8.png

I believe that the same will happen to the Windows 11 Defender when you next tell it to update definitions [it always includes platform updates when it updates definitions].
I'm just about to dive out the door but wanted to let you know since I'd noticed this thread earlier. I'll check my Win11 computer in the next couple of days.

All the best,
Denis
 

My Computer My Computer

At a glance

Windows 11 Home x64 Version 25H2 Build 26200....
OS
Windows 11 Home x64 Version 25H2 Build 26200.8037
Microsoft has quietly withdrawn the faulty Defender AV 1.0.2303.27001 update, eliminating the installation loop bug.
 

My Computer My Computer

At a glance

Windows 11 25H2Intel Core i5-7200U8,00 GBIntel HD Graphics 620, Radeon R5 M420
OS
Windows 11 25H2
Computer type
Laptop
Manufacturer/Model
DELL VOSTRO 15 3568
CPU
Intel Core i5-7200U
Memory
8,00 GB
Graphics Card(s)
Intel HD Graphics 620, Radeon R5 M420
Sound Card
Realtek Audio ALC3246
Monitor(s) Displays
BENQ PD3205UA
Screen Resolution
1920 X 1080
Hard Drives
SK HYNIX SC311 SATA 256 GB, SanDisk Extreme 510 external
Mouse
DELL MS700
Internet Speed
50/15 MB/s VDSL
Browser
Microsoft Edge
Antivirus
Microsoft Defender

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