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Fix 'wuauclt: command not found' Error

If you see wuauclt: command not found when trying to run Windows Update from the com...

UFW Port Closed Despite Allow Rule: Fixes

You've added a UFW allow rule for a port, but a port scan or service test shows the port is still...

Fix Error 0x80070422 Windows Security Version Mismatch

You may see error code 0x80070422 when opening Windows Security, often accompanied by a message a...

Fix Windows Defender Real-Time Protection Grayed Out

You open Windows Security, go to Virus & threat protection, and see that the Real-time protection...

Fix Windows Security Authentication Error 0x80070035

Fix Windows Activation Error 0x803f7001 (Rate Limit)

You see error 0x803f7001 when trying to activate Windows. The message mentions a “rate limit.” Th...