Fix Windows Defender Update Error 0x80070005
You see error 0x80070005 when trying to update Windows Defender. This usually means a permission ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listChecklist to Resolve Windows Defender Update Errors
When Windows Defender fails to update, you might see error codes like 0x80070643, 0x80240022, or ...
Windows Update Login Loop Troubleshooting Checklist
If you're stuck in a Windows update login loop — where you sign in, the screen goes black or logs...
How to Fix Microsoft Store Not Working After Update
After a Windows update, the Microsoft Store may fail to open, load slowly, or show error codes. T...
How to Fix Chrome Extensions Not Loading After Update
After a Chrome update, you might find that some or all of your extensions have stopped working—th...
Fix Windows Update Service Fails to Start After Update
After installing a Windows update, you may find that the Windows Update service (wuauserv) fails ...
Topic paths
Quick titles
How to Safely Clear Windows Update CacheWindows 11 Activation Timeout: How to Fix Connection ErrorsFix Windows Defender Blocked by Group Policy Permission DeniedWindows Update Log Collection GuideBest Practices for Windows Security Policy MigrationResolve Python Module Permission Denied ErrorWindows Update Stuck on Locked File: Force Install GuideFix Microsoft Store High CPU Usage