
Fix Windows Defender Not Starting After Update
After a Windows update, you might see that Windows Defender (now called Microsoft Defender Antivi...
Software troubleshooting desk

After a Windows update, you might see that Windows Defender (now called Microsoft Defender Antivi...

You open Indexing Options, see "Indexing complete" at 99%, and it never finishes. This is a known...

If Task Scheduler keeps asking you to log in repeatedly, or tasks fail with "The user account is ...

If a scheduled task keeps prompting for credentials or fails with login errors, a locked user acc...

When you try to modify certain registry keys related to Windows Defender, you may see an 'Access ...

If you open Windows Security and see 'Windows Defender Service not running' or it hangs on a load...