Forum Discussion

Copper Contributor

Jan 27, 2021

Windows Defender Antimalware Platform 4.18.2101.4 - Problems with group policy and AD MMC

Today the Windows Defender Antimalware Platform was updated automatically from version 4.18.2011.6 -> 4.18.2101.4 on my computer. I didn't notice it at first but since this morning I was experienci...

pgrubor

Copper Contributor

Jan 29, 2021

D4rtual

Can confirm that we are seeing issues with group policy processing times jumping to 5 minutes after Defender Platform was upgraded to 4.18.2101.4 few days ago. Reverting back to 4.18.2011.6 fixes this issue. Windows 10 version where I have confirmed this are 1809 and 1909.

I have logged a ticket with Microsoft Premier Support.

CPetrey

Copper Contributor

Feb 04, 2021

pgrubor Did you get a response from Premier on this? Some folks are saying that 2101.4 and 2101.8 are now marked as superseded.

pgrubor
Copper Contributor
Feb 05, 2021
CPetrey

4.18.2101.8 is available and we do not have those group policy issue anymore with this version. 4.18.2101.4 is gone.
- D4rtual
  Copper Contributor
  Feb 10, 2021
  All,
  I see that version 4.18.2101.8 is expired since yesterday, so I don't know what was wrong with that version. Microsoft released a new version 4.18.2101.9 on WSUS.
  
  The release notes are still mentioning version 4.18.2101.8 however...
  https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-antivirus/manage-updates-baselines-microsoft-defender-antivirus
  - acjuelich
    Copper Contributor
    Feb 10, 2021
    D4rtual
    
    I created a case with MSFT and they admit to the issues but have not given me any official statement or explanation. I told them the case will not be closed until this is admitted to and explained. We will see what happens.