Fix Windows Defender Service Not Running
If you see "Windows Defender service not running" or a red warning in Security Center, the underl...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listOutlook Migration Checklist Before Switching to Office 365
Planning to move from an on-premises Exchange server or a standalone Outlook setup to Office 365?...
Fix OneDrive Error 0x8004de40: Sign-In Issues
When you try to sign in to OneDrive and see error code 0x8004de40, the app usually stops syncing....
How to Fix OneDrive Sync Login Loop
If you're stuck in a OneDrive sync login loop—where you sign in, it seems to work, but then immed...
Fix Windows Activation High Memory Usage After Update
After a recent Windows update, you might notice your PC running slowly and Task Manager showing t...
Fix Firefox Profile Missing Error 0x80520007
When you see Firefox error code 0x80520007, it usually means Firefox cannot find or load your use...
Topic paths
Quick titles
Command Prompt Not Working After Update – Version Mismatch FixHow to Fix Outlook Login Loop Authentication Failed ErrorResolve Error Code 0x80070005 in Command PromptTroubleshoot WinRAR Checksum Errors Post-UpdateRedis Connection Refused in Sentinel SetupTroubleshoot BitLocker Network Unlock Domain Controller ErrorFix Windows Defender Real-Time Protection Stuck OffFix OneDrive 502 Bad Gateway After Update