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

How to Fix Nginx 'Upstream Connection Refused' Error

When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...

npm package.json Not Found After npm init

You run npm init, answer the prompts, and then try to install a package or run a scr...

Fix Windows Update Error 0x800f081f After SFC ScanNow

You run sfc /scannow to check system files, and it completes successfully. But when ...

Fix Node Sass Build Failure After npm Cache Clean

Windows 11 Bluetooth Not Finding Devices: Practical Fixes

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