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

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 Windows Activation Error After Hardware Change

You've just swapped out your motherboard, CPU, or other major hardware, and now Windows shows an ...

Fixing Microsoft Teams Authentication Error CAA2000C

You try to sign in to Microsoft Teams and see error code CAA2000C, often accompanied by a message...

Fix VSCode Extension Host Terminated Error Code 0

What does this error mean?

When you see 'Extension host terminated unexpectedly with erro...

How to Fix Microsoft Teams Not Syncing

If your Microsoft Teams client isn't syncing messages, files, or presence status, you're not alon...

Fix Microsoft Store Not Downloading Apps (Error Code Guide)

You open the Microsoft Store, click install, and nothing happens—or you get an error code. This i...