Software comparisons, alternatives, and tool decision notes.

How to Fix Windows Defender Blank Screen Issue

If you open Windows Defender (now called Windows Security) and see only a blank white or black sc...

Where Windows Defender Stores Its Cache Files

If Windows Defender (now Microsoft Defender Antivirus) won't update definitions, hangs during sca...

Fix Windows Search Path Not Found Environment Variable Error

When Windows Search fails with a 'path not found' error, the environment variable is often the cu...

Fix Chrome Invalid Configuration Errors

You open Chrome and see a message about an invalid configuration, or extensions keep failing, or ...

Checklist for Fixing OneDrive SSL Certificate Issues

You see an error like "A certificate chain could not be built" or "SSL certificate problem" when ...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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