Knowledge base for software setup, errors, and daily tool work.

UFW Deny Port But Still Accessible: Fixes and Checks

You set a UFW deny rule for a specific port, but the port remains accessible from outside. This i...

Fix Windows Store Error 0x80073cf9 Permission Denied

When you see error 0x80073cf9 in the Windows Store, it usually means the installer can't write to...

Fix Windows Activation Authentication Failed: Invalid Product Key

You see "Windows activation authentication failed" or "product key not valid" when trying to acti...

Fixing Microsoft Teams Rate Limit Error When Sending Messages

Fix Windows Terminal Version Mismatch Errors

You launch Windows Terminal and see an error about a version mismatch—perhaps between the termina...

How to Enable PowerShell Script Execution on Windows 10

If you've ever tried to run a PowerShell script on Windows 10 and received an error like "executi...