Checklists for software errors, setup, and tool workflows.

How to Delete a Locked File Using Command Prompt

You've tried to delete a file, but Windows says it's open in another program. This happens often ...

Fix Windows Activation Proxy Error After Network Change

After changing networks—moving offices, switching ISPs, or reconfiguring a VPN—you might see a Wi...

How to Fix Edge Update Error 0x80070643

When updating Microsoft Edge, you may encounter error 0x80070643. This usually indicates a proble...

Fix Outlook Calendar Not Syncing with iPhone

You check your iPhone calendar and notice a meeting from yesterday still shows, or a new event yo...

Fix Windows Security Proxy Error After Update

After a Windows update, you might see a proxy error in Windows Security (formerly Windows Defende...

Fix Outlook High CPU Usage Caused by Antivirus Scanning

Symptoms and Likely Cause

You notice Outlook consuming 50% or more CPU, making your syste...