Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

Fix Windows Update Service Not Running for System Restore

Fix Windows Update Service Not Running for System Restore

You might see “System Restore did not complete successfully” or “Windows Update service is not ru...

Windows 11 Installation Assistant Stuck at 99%: How to Reset and Finish

Windows 11 Installation Assistant Stuck at 99%: How to Reset and Finish

You're upgrading to Windows 11 using the Installation Assistant, and it gets stuck at 99% for...

How to Enable Windows Defender Real-Time Protection in Windows 10

How to Enable Windows Defender Real-Time Protection in Windows 10

If Windows Defender real-time protection is off, your PC is more vulnerable to malware. You may s...

Fix Nginx 13 Permission Denied Error: Step-by-Step

Fix Nginx 13 Permission Denied Error: Step-by-Step

You're configuring Nginx and see 13: Permission denied in the error log. This us...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

When Git reports SSL certificate problem: unable to get local issuer certificate, it...

Fix Chrome Certificate Error: Invalid Authority Registry on Windows

Fix Chrome Certificate Error: Invalid Authority Registry on Windows

When browsing in Chrome, you may encounter a certificate error stating “invalid authority...