Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're seeing an error about a security token being expired or configuration being invalid, it...

You've installed the Java Development Kit (JDK) on Windows 10, but when you type java -vers...

Fix Chrome Update Error 12: Permission Denied
When Chrome fails to update and shows error 12 with a 'permission denied' message, it usually mea...

Fix 'Permission Denied' When Creating a Folder in Command Prompt
You type mkdir newfolder in Command Prompt and get "Access is denied"

Fix Windows Activation Proxy Server Error
When you try to activate Windows and see an error about a proxy server, it usually means the acti...

Fix Windows Activation Stuck on 'Activating'
You see 'Activating' in Settings > System > Activation, but it never finishes. This is a common g...