Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you notice that Windows Security (formerly Windows Defender) is using a lot of memory—sometime...

When you run a command in Command Prompt and get a proxy error like ERROR: Cannot find prox...

Fix Command Prompt Not Recognizing Commands
You type a command in Command Prompt and get '...' is not recognized as an internal or exte...

Fix PowerShell Backup-Restore Script Not Working
If your PowerShell backup-restore script has stopped working or throws errors, this guide covers ...

Fix OneDrive Sync Not Connecting After Update
After a Windows or Office update, OneDrive may stop syncing and show errors like "Can't connect t...

Fix npm Permission Denied and EACCES Cache Errors
If you see npm ERR! Error: EACCES: permission denied when running npm commands, it u...