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

How to Fix Nginx Redirect Loop That Prevents Site Loading

You open your site, and the browser keeps loading until it times out or shows a redirect error. T...

Windows 11 Bluetooth Not Finding Devices: Practical Fixes

If your Windows 11 PC suddenly stops detecting Bluetooth devices—like headphones, keyboards, or m...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Fix Git Push Rejected Non Fast Forward Error

How to Reinstall Windows Security App (Microsoft Defender)

If the Windows Security app (Microsoft Defender) is missing, crashing, or not opening, reinstalli...

Fix Cloudflare Wildcard Subdomain and Root Domain Conflict

If you use a wildcard DNS record (e.g., *.example.com) on Cloudflare, you may run in...