Fix Windows Activation Service Unavailable After Update
After a Windows update, you may see an error saying the activation service is unavailable. This u...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Task Scheduler Access Denied Due to User Account Control
You set up a task in Windows Task Scheduler, but when it runs, you get an 'access denied' error. ...
How to Fix Chrome Token Expired Error 400
You're working in Chrome and suddenly get a 400 error: token expired. This usual...
How to Fix systemd Service Restart Loop
If you see a systemd service repeatedly starting and stopping, you're dealing with a restart loop...
Fix Chrome Authentication Failed by Clearing Cache
You're trying to sign in to a website in Chrome, but you get an "authentication failed" error. Th...
How to Reset Windows Defender Settings to Default
You might need to reset Windows Defender (now Microsoft Defender Antivirus) to its default settin...
Topic paths
Quick titles
OneDrive Authentication Stuck? Clear Cache and CredentialsFix PowerShell 'Service Unavailable Permission Denied' ErrorHow to Fix systemd Service Restart Loop Permission DeniedFix PowerShell Port Already Allocated Error 0x80072746Stop Windows Defender from Using Too Much CPUResolve Windows Update 504 ErrorHow to Fix OneDrive Timeout ErrorsHow to Fix Windows Defender Offline Scan Failure on Windows 10