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

Fix Windows Security App Blocked by Antivirus

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

Fix Cloudflare 521 Error on Nginx: Step-by-Step Guide

If you see a Cloudflare 521 error, it means your origin server (the Nginx server behind Cloudflar...

Cloudflare SSL Full Strict Origin Server Troubleshooting

When you set Cloudflare SSL/TLS encryption mode to Full (strict), your browser-to-Cloudflare conn...

Fix Python Permission Denied When Running pip install -r requirements.txt

How to Fix VS Code Terminal Not Opening

If you click the terminal panel in VS Code and nothing appears, or it opens but stays blank, the ...

Fix DNS Probe Finished NXDOMAIN on Custom DNS Server

If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...