Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

How to Manually Set Up Windows Update on a Mac

If you use a Mac with Boot Camp or a virtual machine like Parallels Desktop or VMware Fusion to r...

How to Fix the Chrome Profile File Locked Error

You try to open Chrome and get a message that says something like “Your profile could not be open...

How to Fix Task Scheduler Proxy Error

If you see a proxy error when running a scheduled task, it usually means the task cannot reach th...

Fix Windows Defender Not Starting After Update

After a Windows update, you might see that Windows Defender (now called Microsoft Defender Antivi...

Windows Defender 502 Bad Gateway: Setup and Troubleshooting Guide

When setting up Windows Defender or updating its definitions, you might encounter a 502 B...

Microsoft Store Not Working: How to Repair and Reinstall
You click the Microsoft Store icon, but nothing happens—or it opens briefly and crashes. Maybe yo...