Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

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 'Access Denied' Windows Update Errors via Group Policy

You click "Check for updates" and get an "Access Denied" message. This often happens because a Gr...

Windows Activation for Ubuntu Installation Guide

You installed Ubuntu alongside Windows and now Windows shows it's not activated. This is a known ...

How to Disable Windows Defender Permanently

Windows Defender (now Microsoft Defender Antivirus) is enabled by default in Windows 10 and 11. W...

How to Fix Outlook Proxy Authentication Failed Error

You try to send or receive email in Outlook and see an error: "Proxy authentication failed"

Fix Windows Defender Error 0x80070422: Won't Turn On
If you see error code 0x80070422 when trying to turn on Windows Defender, it usually means the re...