Checklists for software errors, setup, and tool workflows.

Windows Defender Setup Checklist for New PC

When you set up a new PC, Windows Defender (now called Microsoft Defender Antivirus) is already a...

Fix Chrome Profile 404 Not Found Error

You launch Chrome and see a 404 error related to your profile. The browser may fail to load bookm...

SSL Certificate Error in Command Prompt: Troubleshooting Checklist

When you see SSL certificate errors in Command Prompt — often with tools like curl, ...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

If you're dual-booting Windows and Ubuntu, or replacing Windows...

Chrome DNS Error: How to Reset Network Settings

If Chrome shows a DNS error like "DNS_PROBE_FINISHED_NXDOMAIN" or "ERR_NAME_NOT_RESOLVED", it usu...

Fix Chrome Authentication Failed Certificate Error

When Chrome shows "authentication failed" with a certificate error, it usually means the browser ...