Checklists for software errors, setup, and tool workflows.

Fix Windows Update Error 0x80070002

When Windows Update fails with error 0x80070002, it usually means the update installer can't find...

Fix Windows Security File Locked Error 0x80070020

You try to move, delete, or rename a file, and Windows shows error 0x80070020: "The file is locke...

Fix Microsoft Store Token Expired Error 0x80070424

When you see error 0x80070424 in Microsoft Store, it usually means the authentication token has e...

How to Fix Windows Update Stuck at Checking for Updates

You open Windows Update, and it sits on “Checking for updates” for 30 minutes or more. This is a ...

Fix Windows Defender DNS Error Not Working

You open Windows Security and see a warning that Windows Defender isn't working, often accompanie...

Fix CMD Service Unavailable Due to Group Policy

Situation

You open Command Prompt and see an error like "Command Prompt has been disabled...