Fix 'Windows Defender Firewall Has Blocked' Error
You see a notification that Windows Defender Firewall has blocked an app or feature. This usually...
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View listCloudflare Error 521: Web Server Is Down Checklist
If you see Cloudflare error 521 (web server is down), it means Cloudflare cannot establish a TCP ...
Fix Windows Defender Sync Error 504 Gateway Timeout
If you see a "504 Gateway Timeout" error when Windows Defender tries to sync, it usually means th...
Fix Windows Update Path Not Found Registry Error
If you see 'Windows Update path not found' in Event Viewer or when running wuauclt /detectn...
Fix Windows Update Connection Refused After Network Reset
After resetting your network settings in Windows, you may see a "Connection refused" error when t...
Fix OneDrive Sync Blocked by Network Firewall
If OneDrive stops syncing and you see errors like "Sync is blocked" or files stay stuck with a sp...
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