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dedicated-worker's avatar
dedicated-worker
Copper Contributor
Jan 16, 2025

Microsoft Defender fails to update from File Share

Hello!   I've tried to configure my Windows system to use Defender Updates through File Share. On my domain controller I've set two GPOs to make it possible. Define file shares for downloading se...
defender
update
luchete's avatar
luchete
Iron Contributor
Jan 28, 2025

Hello dedicated-worker 

It looks like there might be a network or maybe a permissions issue. Make sure your system can access the file share properly and that the permissions on the file share are set correctly or didn't changed. Also, check that the update file (mpam-fe.exe) is not corrupted and is up to date. If everything looks good, try clearing the update cache using the PowerShell command Set-MpPreference -SignatureUpdateInterval 0 and then attempt the update again. You could also check the Event Viewer for more details on what's going wrong.

In case here are some PowerShell commands you can use to clear the update cache and reset the update interval:

Set-MpPreference -SignatureUpdateInterval 0
Set-MpPreference -SignatureUpdateInterval 1

These commands can help reset Defender's update settings and might resolve issues with the update process.

Hope it helps!

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