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

Fix Windows Security High CPU Usage on Windows 10

If your Windows 10 PC is running slow and Task Manager shows Windows Security (or Antimalware Ser...

Fix Windows Defender Service Not Starting (Connection Refused)

When you see 'Windows Defender service not starting – connection refused', it usually means the s...

BitLocker Token Expired Permission Denied: How to Fix

You try to unlock a BitLocker drive and see: "Token expired. Permission denied."...

Fix PowerShell Authentication Failed Credentials Error

Windows Security Dependency Conflict Troubleshooting Checklist

Windows Security can fail to start or update properly when a dependency—like a service, driver, o...

How to Fix Windows Defender Slow Performance

Windows Defender (now Microsoft Defender Antivirus) can sometimes cause noticeable slowdowns, esp...