Checklists for software errors, setup, and tool workflows.

Fix Outlook Not Opening After a Recent Update

After a Windows or Microsoft 365 update, Outlook may fail to open—no window appears, or it crashe...

Fix Windows Terminal Proxy Authentication Failed

When Windows Terminal fails to connect through a corporate or personal proxy, you may see errors ...

Windows Defender Service Not Working in Windows 11: Fixes

If Windows Defender won't start or shows a service error in Windows 11, your system may be unprot...

Fix slui.exe High CPU Usage During Windows Activation

If you notice your CPU pegged at 100% while trying to activate Windows, slui.exe (Software Licens...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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

Microsoft Store Authentication Failed: Quick Fix Checklist

You open the Microsoft Store, try to sign in, and get an authentication failed error. This can ha...