Checklists for software errors, setup, and tool workflows.

Fix Nginx Upstream Connection Refused Behind Cloudflare

If you see upstream connection refused in your Nginx error logs while using Cloudfla...

How to Enable Bluetooth Service in Windows 11

If Bluetooth suddenly stops working in Windows 11—the icon disappears, devices won't pair, or...

docker compose set environment variable from file

When running Docker Compose, you often need to pass environment variables to your services. Hardc...

Fix Windows 11 Installation Assistant Stuck at 99% SFC Scan

You're upgrading to Windows 11 using the Installation Assistant, and it hangs at 99% while ru...

Fix npm ERR! enoent ENOENT: package.json Not Found in node_modules

You run npm install or npm start and get something like:

...