Checklists for software errors, setup, and tool workflows.

Fix Windows Update Connection Refused When Using VPN

If you see a "connection refused" error when running Windows Update while connected to a VPN, it'...

How to Set Up Remote Desktop on Windows 11

Before You Start

Remote Desktop lets you connect to your Windows 11 PC from another devic...

Jupyter Kernel Dead: Common Causes and Fixes

You're working in a Jupyter notebook, and suddenly the kernel dies. The notebook becomes unrespon...

Fix Chrome Profile Authentication Failed on Mac

If you see a "Profile authentication failed" error in Chrome on your Mac, it usually means Chrome...

How to Fix Windows Security Certificate Error Not Trusted

You're browsing or running an app and Windows throws a security warning: the certificate is not t...

Windows Update Stuck at 100% Loading but Not Installing: How to Fix

You've waited for the update to reach 100%, but it just sits there—not installing, not erroring. ...