How to Fix Windows Update Error 404 Not Found
You see error 404 when checking for updates in Windows Update. This usually means the update serv...
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Browse manualsFix Nginx Config Test Fails with 'upstream host not found'
You run nginx -t and get upstream host not found. The config test fails...
Fix Windows Security Antivirus Not Turning On
You open Windows Security and see that the antivirus is off, with no obvious way to turn it on. T...
Windows Security Version Mismatch: Troubleshooting Checklist
If you see an error message saying Windows Security has a version mismatch, or the Security Cente...
Fix Windows Defender DNS Error 0x800704cf
You open Windows Defender and see error code 0x800704cf. This usually means Windows Defender can’...
Fix Windows Search Indexer Not Working with Blank Screen
If you open the Windows Search Indexer settings and see a blank screen instead of the usual list ...
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