How to manually install Windows Defender?


I

infinity

Active member
VIP
Local time
7:17 PM
Posts
109
Visit site
OS
Win 11
I just realised it's not available. How do I manually install it?

websiteforstudents.com

How to Add Microsoft Defender Exclusions on Windows 11

This post shows students and new users steps to add an exclusion to Microsoft Defender on Windows 11. Microsoft Defender (formally Windows Defender) will scan your computer files for viruses and m…
websiteforstudents.com websiteforstudents.com
 

My Computer

System One

  • OS
    Win 11
    Computer type
    PC/Desktop
    CPU
    Ryzen 3600
    Motherboard
    MSI B450 Tomahawk Max
    Memory
    GSkill RipJawz 16Gbx2
    Graphics Card(s)
    GTX960
    Screen Resolution
    2560x1440
    Hard Drives
    WD750 SSD 1TB
    PSU
    650w FSP
Bree

Bree

Well-known member
Guru
VIP
Local time
12:17 PM
Posts
9,211
Location
S/E England, UK
Visit site
OS
Windows 11 Home
infinity said:
I just realised it's not available. How do I manually install it?
Click to expand...
Defender should be installed already, it's part of Windows. One reason it could be missing is if you have installed a 3rd-party AV. Doing so will disable Defender. You can't run two AVs at the same time.
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB Samsung EVO 870 SSD
    Internet Speed
    50 Mbps
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October. Windows Update offered the 22H2 Feature Update on 20th September 2022.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 4GB RAM, 128GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro 22H2 Insider Beta, and the release build of Win11 22H2, both as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 4GB RAM, 128GB NVMe ssd, supported device running Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    8GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround. In-place upgrade to 22H2 using ISO and a workaround.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 4GB RAM, 128GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro 22H2 Insider Beta, and the release build of Win11 22H2, both as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 4GB RAM, 128GB NVMe ssd, supported device running Windows 11 Pro.
I

infinity

Active member
VIP
Thread Starter
Local time
7:17 PM
Posts
109
Visit site
OS
Win 11
hmm I have not installed a new AV yet though.
 

My Computer

System One

  • OS
    Win 11
    Computer type
    PC/Desktop
    CPU
    Ryzen 3600
    Motherboard
    MSI B450 Tomahawk Max
    Memory
    GSkill RipJawz 16Gbx2
    Graphics Card(s)
    GTX960
    Screen Resolution
    2560x1440
    Hard Drives
    WD750 SSD 1TB
    PSU
    650w FSP
Fabler2

Fabler2

Well-known member
Power User
VIP
Local time
12:17 PM
Posts
2,388
Visit site
OS
Win 11 Pro & Dev.
Do you have Windows Security showing in the all apps list?
 

My Computers

System One System Two

  • OS
    Win 11 Pro & Dev.
    Computer type
    Laptop
    Manufacturer/Model
    ASUS VivoBook
    CPU
    AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx
    Motherboard
    ASUSTeK COMPUTER INC. X509DA (FP5)
    Memory
    12GB
    Graphics Card(s)
    RX Vega 10 Graphics
    Monitor(s) Displays
    Generic PnP Monitor (1920x1080@60Hz)
    Screen Resolution
    1920x1080@60Hz
    Hard Drives
    Samsung 980 1 TB PCIe 3.0 NVMe M.2
    Internet Speed
    25 Mbps
    Browser
    Edge
    Antivirus
    Defender
  • Operating System
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    ACER NITRO
    CPU
    AMD Ryzen 7 5800H / 3.2 GHz
    Motherboard
    CZ Scala_CAS (FP6)
    Memory
    16 GB (2 x 8 GB) DDR4 SDRAM 3200 MHz
    Graphics card(s)
    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
    Sound Card
    Realtek Audio. NVIDIA High Definition Audio
    Monitor(s) Displays
    15.6" LED backlight 1920 x 1080 (Full HD) 144 Hz
    Screen Resolution
    1920 x 1080 (Full HD)
    Hard Drives
    Samsung 970 Evo Plus 2TB NVMe M.2
    PSU
    180 Watt, 19.5 V
    Mouse
    Lenovo Bluetooth
    Internet Speed
    25 Mbps
    Browser
    Edge
    Antivirus
    Defender
I

infinity

Active member
VIP
Thread Starter
Local time
7:17 PM
Posts
109
Visit site
OS
Win 11
no there isn't.
 

My Computer

System One

  • OS
    Win 11
    Computer type
    PC/Desktop
    CPU
    Ryzen 3600
    Motherboard
    MSI B450 Tomahawk Max
    Memory
    GSkill RipJawz 16Gbx2
    Graphics Card(s)
    GTX960
    Screen Resolution
    2560x1440
    Hard Drives
    WD750 SSD 1TB
    PSU
    650w FSP
cereberus

cereberus

Well-known member
Pro User
VIP
Local time
12:17 PM
Posts
3,888
Visit site
OS
Windows 10 Pro + others in VHDs
Unless you have some modified version of Windows, or been using some dodgy scripts to remoove/disable it it is virtually impossible not to have Defender as it is a core application.

Reinstalling Windows from scratch is your only realistic solution.
 

My Computer

System One

  • OS
    Windows 10 Pro + others in VHDs
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
    Sound Card
    Realtek built in
    Monitor(s) Displays
    N/A
    Screen Resolution
    1920x1080
    Hard Drives
    1 TB Optane NVME SSD, 1 TB NVME SSD
    PSU
    Yep, got one
    Case
    Yep, got one
    Cooling
    Stella Artois
    Keyboard
    Built in
    Mouse
    Bluetooth , wired
    Internet Speed
    72 Mb/s :-(
    Browser
    Edge mostly
    Antivirus
    Defender
    Other Info
    TPM 2.0
I

infinity

Active member
VIP
Thread Starter
Local time
7:17 PM
Posts
109
Visit site
OS
Win 11
I see. in that case I'll just go with a 3ʳᵈ party AV. Is Avast the absolute best compared to all others in detection rate?
 

My Computer

System One

  • OS
    Win 11
    Computer type
    PC/Desktop
    CPU
    Ryzen 3600
    Motherboard
    MSI B450 Tomahawk Max
    Memory
    GSkill RipJawz 16Gbx2
    Graphics Card(s)
    GTX960
    Screen Resolution
    2560x1440
    Hard Drives
    WD750 SSD 1TB
    PSU
    650w FSP
Bree

Bree

Well-known member
Guru
VIP
Local time
12:17 PM
Posts
9,211
Location
S/E England, UK
Visit site
OS
Windows 11 Home
infinity said:
Is Avast the absolute best compared to all others in detection rate?
Click to expand...
No, there is no single clear ''best'. Almost all, including Defender, get ranked equally with a top score of straight 6's here:
www.av-test.org

Test antivirus software for Windows 10 - December 2022

The current tests of antivirus software for Windows 10 from December 2022 of AV-TEST, the leading international and independent service provider for antivirus software and malware.
www.av-test.org www.av-test.org
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB Samsung EVO 870 SSD
    Internet Speed
    50 Mbps
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October. Windows Update offered the 22H2 Feature Update on 20th September 2022.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 4GB RAM, 128GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro 22H2 Insider Beta, and the release build of Win11 22H2, both as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 4GB RAM, 128GB NVMe ssd, supported device running Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    8GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround. In-place upgrade to 22H2 using ISO and a workaround.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 4GB RAM, 128GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro 22H2 Insider Beta, and the release build of Win11 22H2, both as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 4GB RAM, 128GB NVMe ssd, supported device running Windows 11 Pro.
TairikuOkami

TairikuOkami

Brony
Power User
VIP
Local time
1:17 PM
Posts
684
Visit site
OS
Windows 11 Home
infinity said:
Is Avast the absolute best compared to all others in detection rate?
Click to expand...
Avast, AVG, Kaspersky, Defender, are a few AVs that can detect fileless malware, some better than others.
 

My Computer

System One

  • OS
    Windows 11 Home
    CPU
    AMD Ryzen 5 3600 (07/19)
    Motherboard
    MSI B450 TOMAHAWK 7C02v1E (07/19)
    Memory
    4x 8GB ADATA XPG GAMMIX D10 DDR4 3200MHz CL16
    Graphics Card(s)
    MSI Radeon RX 580 ARMOR 8G OC @48FPS (08/19)
    Sound Card
    Creative Sound Blaster Z (11/16)
    Monitor(s) Displays
    24" AOC G2460VQ6 (01/19)
    Screen Resolution
    1920×1080@75Hz + FreeSync (DisplayPort)
    Hard Drives
    ADATA XPG GAMMIX S11 Pro SSD 512GB (07/19)
    PSU
    Seasonic M12II-520 80 Plus Bronze (11/16)
    Case
    Lian Li PC-7NB + 3x Noctua NF-S12A FLX@700rpm (11/16)
    Cooling
    CPU Cooler Noctua NH-U12S@700rpm
    Keyboard
    HP Wired Desktop 320K Keyboard (04/22)
    Mouse
    HP Wireless Silent 280M Mouse (05/21)
    Internet Speed
    400/40 Mbps via RouterOS (05/21) + TCP Optimizer
    Browser
    Edge with Neeva (No FB/Google) + Brave for YouTube + LibreWolf for FB
    Antivirus
    NoAV + Binisoft WFC + NextDNS
    Other Info
    Headphones: Sennheiser RS170 (09/10)
cereberus

cereberus

Well-known member
Pro User
VIP
Local time
12:17 PM
Posts
3,888
Visit site
OS
Windows 10 Pro + others in VHDs
I would be more concerned why PC does not have Defender. Who knows what type of malware e.g. keyloggers have been installed already. Personally, I would not take the risk and teinstall from scratch and then change all online pssswords e.g. to bank, ebay etc.

Paranoia ? Maybe but can you afford to take the risk?
 

My Computer

System One

  • OS
    Windows 10 Pro + others in VHDs
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
    Sound Card
    Realtek built in
    Monitor(s) Displays
    N/A
    Screen Resolution
    1920x1080
    Hard Drives
    1 TB Optane NVME SSD, 1 TB NVME SSD
    PSU
    Yep, got one
    Case
    Yep, got one
    Cooling
    Stella Artois
    Keyboard
    Built in
    Mouse
    Bluetooth , wired
    Internet Speed
    72 Mb/s :-(
    Browser
    Edge mostly
    Antivirus
    Defender
    Other Info
    TPM 2.0
WXC

WXC

Well-known member
Guru
VIP
Local time
6:17 AM
Posts
12,455
Location
U.S.A.
Visit site
OS
Windows 10 Pro 64-bit 22H2 19045.2728
cereberus said:
I would be more concerned why PC does not have Defender. Who knows what type of malware e.g. keyloggers have been installed already. Personally, I would not take the risk and teinstall from scratch and then change all online pssswords e.g. to bank, ebay etc.

Paranoia ? Maybe but can you afford to take the risk?
Click to expand...

Worth repeating. I agree. (y)


@infinity
 

My Computer

System One

  • OS
    Windows 10 Pro 64-bit 22H2 19045.2728
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell/Vostro 470 (Year 2012)
    CPU
    Intel i7-3770 @ 3.40GHz
    Memory
    8 GB
    Graphics Card(s)
    AMD 7500 Radeon HD Series
    Sound Card
    Realtek Hi-Def Audio
    Monitor(s) Displays
    Dell U2412M
    Hard Drives
    1 TB 7200 HDD
    Keyboard
    Dell/USB
    Mouse
    Dell/USB
    Internet Speed
    100/10
    Browser
    Edge
    Antivirus
    Windows Security/MalwareBytes Premium
You must log in or register to reply here.

Similar threads

I Disabled Real Time Protection but Windows Defender Is still Running
Replies
12
Views
963
Wisewiz
Wisewiz
Solved Bluetooth blocked by Defender
Replies
2
Views
266
rdwray
R
Solved Core Isolation Is that Needed on?
Replies
9
Views
1K
ShamrockRig
S
Windows defender exclusions how to list them ?
Replies
19
Views
3K
Try3
Try3
Solved Windows 11 upgrade broke Windows Defender Firewall
Replies
2
Views
516
angd
A

Latest Tutorials

Latest Support Threads

Top Bottom