Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fixing Outlook Dependency Conflicts with Office 365

When Outlook stops working after an Office 365 update or a new add-in, a dependency conflict is o...

Windows Activation File Locked: Fix for Windows 10

You see an error saying the Windows activation file is locked, or activation fails with a file ac...

Fix Microsoft Store Not Opening After Update

After a Windows update, you might click the Microsoft Store icon and see nothing happen—no window...

Fix Windows Security Auto-Start Not Working After Update

After a recent Windows update, you might notice that Windows Security (formerly Windows Defender)...

How to Fix 'Port Already in Use' Error on Windows

When you see an error like Port 8080 already in use or Address already in use<...

Windows Update Failed to Install Manually: Practical Fixes
You download a Windows update from the Microsoft Update Catalog, double-click the .msu file, and ...