
Windows Security Version Mismatch: Troubleshooting Checklist
If you see an error message saying Windows Security has a version mismatch, or the Security Cente...
Software troubleshooting desk

If you see an error message saying Windows Security has a version mismatch, or the Security Cente...

You've installed OneDrive, but when you try to configure it—sign in, select folders, or start syn...

If you see a “version mismatch” error in Windows Defender (Microsoft Defender Antivirus), it usua...

If you see "Windows Update service is disabled" and cannot start it manually, Group Policy is lik...

If Outlook is using 30% or more CPU for extended periods, your system slows down and battery drai...

If your PC fan is spinning up and Task Manager shows SearchIndexer.exe using high CPU, the search...