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

Fix Windows 11 Blue Screen After Memory Diagnostic

You ran Windows Memory Diagnostic after a blue screen, and now you're stuck in a loop or seei...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

Windows Security App Not Opening: Practical Fixes

If the Windows Security app won't open—clicking the icon does nothing, or it crashes immediat...

Fix Node Version Incompatible with npm Package Error

Fix Chrome Certificate Error: Invalid Authority on Company Network

When Chrome displays Your connection is not private with NET::ERR_CERT_AUT...