Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

Windows Security (formerly Windows Defender Security Center) may fail to load or reset properly d...

If you're behind a corporate firewall and see SSL: CERTIFICATE_VERIFY_FAILED when ru...

When Edge profile sync shows as paused, your bookmarks, passwords, and settings stop syncing acro...

When Windows Search throws an SSL certificate error—often as 'The certificate is not valid' or 'A...

If you see error 0x80040c41 in Windows Search indexing, it usually means the sea...

If your games stutter, take long to load, or feel sluggish, Windows Defender might be scanning ga...