Checklists for software errors, setup, and tool workflows.

Fix Nginx Upstream Connection Refused in Docker

You have Nginx running, either on the host or in a container, proxying to another Docker containe...

Windows Security App Not Working After Update: Fixes

After a Windows update, the Windows Security app may fail to open, show a blank window, or displa...

Fix Windows 11 Installation Assistant Frozen During Update

You launch Windows 11 Installation Assistant to upgrade from Windows 10, but the progress bar sto...

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

How to Fix Nginx Configuration Test Failed Error

When you run nginx -t and see "test failed", it means nginx found a problem ...

Fix Docker Pull Access Denied for Private Repository

When you run docker pull for a private repository and get an access denied