Manually download Defender Definitions:
.bat file code:
cd %ProgramFiles%Windows Defender
MpCmdRun.exe -removedefinitions -dynamicsignatures
In this video I show how to repair the Windows Defender Updates Failed error that you may see after Windows Defender tries to do an update. There are several things to try to correct this including making sure that your Windows update is operating okay with the troubleshooter. You also want to check for updates using the Windows Defender app. I also show you how to create a .bat file that clears all of the Windows Defender update cache and forces Windows Defender to re-install the Windows Defender updates. I also show how you can manually download the defender definitions. and finally you can use wsus offline program to run that will possibly get your Windows Defender definitions updated properly. If you are in the Savannah Georgia area stop in and say hello.