Checklists for software errors, setup, and tool workflows.

Fix PowerShell Assembly Cache Not Updating

You’ve updated a .NET assembly in the Global Assembly Cache (GAC) or copied a new DLL into a modu...

Fix CMD Service Unavailable Due to Group Policy

Situation

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

Fix Windows Activation Error 0x80070057: Step-by-Step

When you see "Windows activation failed to start" with error code 0x80070057, it usually means th...

How to Fix Windows Security DNS Error 0x800704cf

You might see error 0x800704cf when opening Windows Security or trying to update Windows Defender...

How to Fix BitLocker Sync Issues with Active Directory

You might see a BitLocker recovery key not backing up to Active Directory, or a status of "Backup...

Check If Your Windows License Is Retail or OEM

If you're troubleshooting activation issues or planning to transfer Windows to a new computer, kn...