Fix Windows Defender Token Expired Preventing Service Start
You see 'Token expired' in the Windows Defender event log or a notification that the service didn...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Windows Update Error 502 Bad Gateway
Windows Update may show a 502 Bad Gateway error when the update service cannot reach Microsoft's ...
How to Fix Windows Security High Memory Usage
You open Task Manager and see Windows Security (or Antimalware Service Executable) using 500 MB o...
Fix MySQL Access Denied for User with Correct Password
You've double-checked the username and password, but MySQL still returns 'Access denied for user'...
How to Fix 'Windows Update Command Not Found' in Command Prompt
When you type wuauclt or usoclient in Command Prompt and get a 'command...
Fix Windows Activation Server 504 Timeout Error
You try to activate Windows and get an error: "Windows activation server not responding 504 timeo...
Topic paths
Quick titles
Chrome Profile Error: Causes and FixesHow to Resolve Windows 10 Activation Error 0x803fa067Fix Microsoft Store Authentication Token Expired ErrorReduce Windows Update High RAM UsageFix 'BitLocker Recovery Key Not Accepted' in Windows 10Fix Windows Update Cleanup Stuck After UpdatesWindows Rearm Command: Reset Activation TimerDISM Error 0x80073712 Troubleshooting Guide