Problem With Windows Defender Updates.


Mitch

Well-known member
Member
Local time
2:42 PM
Posts
167
Location
UK
OS
Windows 11 Home
Hello, We have a problem with Windows Defender updates which started on Tuesday. Our PC is Windows 11 23H2 22631.2861 and is up to date. We use Norton 360 and so Windows Defender is turned off which is what it shows in Windows Security, although Defender definitions are downloaded which isn't the case with our other machine. I can't access Defender to manually update from Windows Security without uninstalling Norton. Recently, when I have been manually checking for Windows Updates a Defender Definition is downloaded to 88% and doesn't start installing. The only way to get it installed is by rebooting. Strange thing is I can manually install them during the day with no problem - just seems to be first thing. I usually pause Windows Updates and resume updates next day, not sure if that means anything. I did a repair install of Windows 11 but no change. I would be grateful for any suggestions. Thanks Mitch.
 
Windows Build/Version
Windows 11 23H2 v 22631.2861

My Computer

System One

  • OS
    Windows 11 Home
1) Uninstall Norton software with the applicable uninstall tool:



2) See if these troubleshooters make any changes:

https://aka.ms/EasyFix_WinSecurity

https://support.microsoft.com/en-us/...2-607b0cbd7fc4

 

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
    Motherboard
    Product : 190A Version : KBC Version 94.56
    Memory
    16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
    Graphics Card(s)
    NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
    Sound Card
    IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
    Hard Drives
    Model Hitachi HTS727575A9E364
    Antivirus
    Microsoft Defender
    Other Info
    Mobile Workstation
Hi. Thanks for replying. I uninstalled Norton 360 using the removal tool and rebooted. I turned everything on in Windows Security and ran both troubleshooters. Both showed the same message - "We cannot detect the status of your firewall". Next "Problem Found - Windows Firewall Is Not The Default Firewall. Not fixed" I checked Windows Security. Firewall and Network Protection - Microsoft Defender Firewall - On.
Under security providers - Anti Virus, Microsoft Defender Is Turned On. Firewall, Windows Firewall Is On. I assume if Windows Security says the Windows Firewall is on then that's OK. The troubleshooter did not make any changes. Thanks for your help Mitch.
 

My Computer

System One

  • OS
    Windows 11 Home
Hi @mackie . I tried a repair install first with Norton in place bur the Defender definitions still didn't install. I then uninstalled Norton and Reflect (to remove the licence) and did a clean install. I didn't reinstall Norton (on this PC) although Norton is on 2 others. If you use Norton, you have no access to Defender settings and manual updates unless you uninstall Norton. This desktop PC is different from the other 2. If I run WU check it will download definition updates which appear in Update History- in the other 2, no definitions are downloaded and don't appear in Reliability Monitor which shows installations. No one, seems to know why this is as all 3 PCs were setup the same way. Regards.

The only thing I can suggest is that if you have a backup or restore go back to prior Tuesday (per your opening post).
 

My Computer

System One

  • OS
    Windows 11/Linux Mint
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 960
    CPU
    Intel Core 2 Duo CPU E8400 @ 3.00 GHz x 2
    Memory
    8 GB
    Graphics Card(s)
    Intel 4 Series Chipset Integrated Graphics Controller
    Monitor(s) Displays
    HP x22LED
    Hard Drives
    Crucial 250 GB SSD, HD 1Tb

Latest Support Threads

Back
Top Bottom