Fix Windows Defender Not Opening Error 404
You try to open Windows Defender and get an error 404 – the page or resource can't be found. This...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows Terminal 'Unable to Verify the First Certificate' Error
When using Windows Terminal to connect to a remote server via SSH or access a website over HTTPS,...
Cloudflare 522 Error: How to Fix Firewall-Caused Connection Timeouts
If you see a Cloudflare 522 error, it means Cloudflare connected to your origin server but the se...
How to Fix Chrome High CPU Usage Caused by Extensions
If Chrome is using an unusual amount of CPU, extensions are a common culprit. You might notice yo...
How to Fix Outlook Dependency Conflict During Setup
When setting up a new Outlook profile or installing an add-in, you may see a message like "A depe...
How to Clear Windows Update Cache When Stuck
If Windows Update is stuck at a certain percentage or taking forever to check for updates, a corr...
Issue queue
SitemapTroubleshooting Teams Connection Refused Error
Fix 'Command Not Found' in Windows Terminal When Antivirus Is Active
Resolve Chrome Version Mismatch After Updating
Complete Guide to Troubleshoot Windows Search Stuck Loading
Fix Outlook with the Settings Reset Tool
Remote Desktop File Locked by Unknown User: How to Fix
Clear Windows Update Cache via Command Line
WireGuard Handshake Not Completing: Practical Fixes
Fix BitLocker Proxy Error Code: Practical Steps
How to Fix BitLocker High CPU Usage
Fix Chrome Extension Permission Issues
How to Fix Chrome Profile Permission Denied Error
Fix 'Command Not Found' in Windows Terminal When Antivirus Is Active
Resolve Chrome Version Mismatch After Updating
Complete Guide to Troubleshoot Windows Search Stuck Loading
Fix Outlook with the Settings Reset Tool
Remote Desktop File Locked by Unknown User: How to Fix
Clear Windows Update Cache via Command Line
WireGuard Handshake Not Completing: Practical Fixes
Fix BitLocker Proxy Error Code: Practical Steps
How to Fix BitLocker High CPU Usage
Fix Chrome Extension Permission Issues
How to Fix Chrome Profile Permission Denied Error