Windows 11 not updating after installing Bitdefender.

Run cmd as an administrator and copy the complete code and press enter. This will reset your windows update settings to default.

net stop bits

net stop wuauserv

net stop cryptsvc

net stop msiserver

rmdir /s /q "%systemroot%\SoftwareDistribution"

mkdir "%systemroot%\SoftwareDistribution"

echo Registering Windows Update files...

cd /d %windir%\system32

regsvr32.exe /s atl.dll

regsvr32.exe /s urlmon.dll

regsvr32.exe /s mshtml.dll

regsvr32.exe /s shdocvw.dll

regsvr32.exe /s browseui.dll

regsvr32.exe /s jscript.dll

regsvr32.exe /s vbscript.dll

regsvr32.exe /s scrrun.dll

regsvr32.exe /s msxml.dll

regsvr32.exe /s msxml3.dll

regsvr32.exe /s msxml6.dll

regsvr32.exe /s actxprxy.dll

regsvr32.exe /s softpub.dll

regsvr32.exe /s wintrust.dll

regsvr32.exe /s dssenh.dll

regsvr32.exe /s rsaenh.dll

regsvr32.exe /s gpkcsp.dll

regsvr32.exe /s sccbase.dll

regsvr32.exe /s slbcsp.dll

regsvr32.exe /s cryptdlg.dll

regsvr32.exe /s oleaut32.dll

regsvr32.exe /s ole32.dll

regsvr32.exe /s shell32.dll

regsvr32.exe /s initpki.dll

regsvr32.exe /s wuapi.dll

regsvr32.exe /s wuaueng.dll

regsvr32.exe /s wuaueng1.dll

regsvr32.exe /s wucltui.dll

regsvr32.exe /s wups.dll

regsvr32.exe /s wups2.dll

regsvr32.exe /s wuweb.dll

regsvr32.exe /s qmgr.dll

regsvr32.exe /s qmgrprxy.dll

regsvr32.exe /s wucltux.dll

regsvr32.exe /s muweb.dll

regsvr32.exe /s wuwebv.dll

net start bits 

net start wuauserv 

net start cryptsvc 

net start msiserver 

exit

exit

Restart your computer and check if windows update is running properly.

If issue persists,

Try running windows update after temporarily disabling bitdefender protection: https://www.bitdefender.com/consumer/support/answer/28557/

If the issue still persists,

Generate bitdefender BDsysLog: https://www.bitdefender.com/consumer/support/answer/1922/

Generate bitdefender support tool logs: https://www.bitdefender.com/consumer/support/answer/1733/

Generate bitdefender connectivity logs: https://www.bitdefender.com/consumer/support/answer/9689/

Share the logs & your query with bitdefender support team by dropping them an email at bitsy@bitdefender.com

If the generated logs are larger in size, you can upload the logs to google drive or we.tl (7days link validity for free users) or ask the support team to provide you with the online link & password of bitdefender cloud where you can upload the logs and share the upload link with the support team.

The support team will reply back to your query within next 24-48 hours excluding weekends.

Regards