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

Fixing NGINX Upstream Connection Refused SSL Errors

When NGINX logs upstream connection refused for an SSL backend, it usually means the...

Chrome Memory Not Decreasing After Closing Tabs – Fixes

You close a dozen tabs, but Chrome still eats 2 GB of RAM. This is normal up to a point—Chrome ca...

Bluetooth Not Working After Windows 11 Update? Try These Fixes

After a Windows 11 update, you might find Bluetooth missing, devices not pairing, or intermittent...

Fix Bluetooth Not Showing in Device Manager on Windows 11

If you open Device Manager on Windows 11 and Bluetooth is completely absent—no adapter listed und...

How to Allow Unrelated Histories in Git Merge

How to Fix a Detached HEAD with Git Reset --hard

You're working in Git, and suddenly you see a warning: You are in 'detached HEAD...