Windows Security Troubleshooting Guide
Windows Security (formerly Windows Defender) usually runs quietly in the background, but sometime...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Task Scheduler DNS Error Code 0x1
If you see error code 0x1 in Task Scheduler after a task runs, it usually means the task failed. ...
Fix OneDrive Login Loop with Permission Denied Error
If OneDrive keeps asking you to sign in repeatedly, or you see a "permission denied" message when...
Fix Windows Activation Gateway Timeout on a Domain Network
You might see a Windows activation error like "We can't activate Windows on this device because t...
Fix Windows Defender Token Expired Group Policy Error
You may see a Windows Defender error like 'Token expired' or 'The token is expired' in the Window...
How to Fix Windows Security Error 0x80070422
You open Windows Security and get error 0x80070422, or see a message that the app can't start. Th...
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