Checklists for software errors, setup, and tool workflows.

How to Fix Nginx Upstream Connection Refused on Port 80

When nginx logs show "upstream connection refused" while connecting to port 80, it means ...

How to Fix Chrome Memory Hogging on Windows and Mac

You open Chrome, and your system slows to a crawl. The fan spins up, apps lag, and Task Manager s...

Fix Windows Security App Not Opening Command Prompt

You click the Windows Security icon or try to launch it from Settings, but nothing happens. Or pe...

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...

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 WiFi Connected But No Internet on Windows 11 Using Netsh

You connect to WiFi, see full bars, but websites won't load. This is common on Windows 11. Th...