Knowledge base for software setup, errors, and daily tool work.

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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

Fix Windows Security Service Not Starting

You open Windows Security and see an error that the service isn't running. Or you get a notificat...

How to Fix Windows Defender Not Opening

When you click Windows Defender and nothing happens, or it opens and immediately closes, it's oft...

BitLocker Proxy Error Sync Issue: Causes and Fixes

When BitLocker fails to sync with a proxy server, you may see errors like "0x8007007a" or "The pr...

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...

Fix Remote Desktop Authentication Failed: Credential Manager Guide

When you try to connect to a remote PC and see "Authentication failed", the prob...