Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

Windows Security (formerly Windows Defender) can sometimes fail to open, show blank screens, or r...

You try to activate Windows, but the activation fails with an error like '0xC004F074' or 'The act...

If your Windows Search migration tool stops indexing files after a system upgrade or data transfe...

If you're running Windows on a Mac via Boot Camp or a virtual machine and Windows Defender won't ...

If you see errors like ERROR: A specified logon session does not exist or Unab...

Fix Windows Security Virus Scan Stuck at 99%
You run a full virus scan in Windows Security, and it gets stuck at 99% for minutes or hours. Thi...