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

How to Allow Unrelated Histories in Git Merge

Cloudflare DNS Not Propagating After SSL Certificate Change

You changed an SSL certificate in Cloudflare, but DNS changes aren't showing up. This is a co...

Windows Security App Not Opening as Administrator: Fixes

When you try to open the Windows Security app and it fails to launch, often with no error message...

Cloudflare Wildcard Subdomain Cache Not Working: Fixes

If you use a wildcard DNS record like *.example.com proxied through Cloudflare, you ...

How to Turn On Bluetooth in Windows 11: Quick Fixes

You open Quick Settings, click the Bluetooth icon, and nothing happens—or the toggle is grayed ou...

Fix Docker Nginx 502 Bad Gateway Upstream Error

When running Nginx as a reverse proxy in Docker, a 502 Bad Gateway error with 'upstream' ...