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

How to Fix Chrome Extensions Not Loading or Grayed Out

You open Chrome, click the puzzle icon, and see your extensions grayed out or missing. They don&#...

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fix Windows Security App Blocked by Antivirus

You open Windows Security (formerly Windows Defender) only to see an error or blank screen becaus...

How to Repair Windows Security App Issues

If the Windows Security app won't open, shows a blank screen, or gives errors like "This ...

Recover Lost Commits After Git Detached HEAD

You've made commits while in a detached HEAD state, and now you can't see them on any bra...

Fix Node Sass Build Failure After npm Cache Clean