Checklists for software errors, setup, and tool workflows.

Fix Windows Defender Offline Scan Not Working on Windows 10

When Windows Defender offline scan fails to start or complete on Windows 10, you might see an err...

Fix Outlook High CPU Usage Caused by Antivirus Scanning

Symptoms and Likely Cause

You notice Outlook consuming 50% or more CPU, making your syste...

Fix Outlook Version Mismatch Registry Error

You open Outlook and see an error about a version mismatch, or Outlook won't start because of a r...

Windows Update Rate Limit Error: Troubleshooting Checklist

If you see a rate limit error when checking for Windows Updates, it usually means the update serv...

Windows Security 404 Not Found: Setup and Fix Guide

When you open Windows Security (formerly Windows Defender) and see a blank page or a '404 Not Fou...