Windows Defender Signature Updates not working automatically

Question

hello, i have an issue with Defender signature updates. We have a Win10 Enterprise LTSC Client (21H2) which is connected to an internal WSUS-Server above GPO. The problem is, that the signature updates doesnt work automatically. Manually starting the defender updates work. Also the windows updates are working automatically, but the Defender signature updates doesnt updates. The workaround with an script and scheduled tasks also work, but i want to know why the automatic defender updates dont work?!

This ist the output from: MpCmdRun.exe -removedefinitions -all

Service Version: 4.18.23110.3 Engine Version: 1.1.23110.2 AntiSpyware Signature Version: 1.403.3727.0 AntiVirus Signature Version: 1.403.3727.0 Starting engine and signature rollback to none...Failed! Error 0x80070005 Service Version: 4.18.23110.3 Engine Version: 1.1.23110.2 AntiSpyware Signature Version: 1.403.3727.0 AntiVirus Signature Version: 1.403.3727.0 CmdTool: Failed with hr = 0x80070005. Check C:\Users\ADM_TA~1\AppData\Local\Temp\MpCmdRun.log for more information

Thx for your help Tugi

Answer 1

Hello This can be due to a variety of reasons, including network issues, software conflicts, or system settings. Here are some steps you can try:   Manually check for updates in Windows Defender: Sometimes, a temporary issue can be resolved by manually checking for updates.   Run Windows Update Troubleshooter: This built-in tool can resolve most issues related to Windows Updates.   Trigger Microsoft Defender updates using the command line: You can manually trigger the update to devices. The command will clear the current cache and trigger an update.   Manage the sources for Microsoft Defender Antivirus protection updates: You can specify from where updates should be downloaded (this specification is also known as the fallback order).   Disable all third-party security programs: Sometimes, third-party security programs can interfere with Windows Defender updates.   Remember to restart your PC after trying these solutions.

Answer 2

Hi Wesley,

thx for your answer, but i have tried all the things you describe...

• Manually check for updates in Windows Defender
• Run Windows Update Troubleshooter:
• Trigger Microsoft Defender updates using the command line:
• Manage the sources for Microsoft Defender Antivirus protection updates (configured as InternalDefinitionUpdateServer in GPO setting)
• Disable all third-party security programs: Sometimes (we have deleted the third party AV software before)

Its all the same, manually works, automatically NOT!