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

How to Fix Windows Defender Proxy Error: Step-by-Step Guide

You open Windows Security and see a message like "Proxy server or something is preventing Windows...

Windows Security App Not Working After Update: Fixes

After a Windows update, the Windows Security app may fail to open, show a blank screen, or displa...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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

How to Fix Windows Security Rate Limit Error

You may see a Windows Security rate limit error when trying to open the app or run a scan. This o...

Fix Windows Defender Configuration Not Working Properly

When Windows Defender (Microsoft Defender Antivirus) configuration doesn't work properly, you mig...

Fix 'Command Not Found' When Setting Up Windows Update via Command Line

When you try to run wuauclt, UsoClient, or Install-Module PSWindo...