Fix Windows Defender Service Not Starting (Connection Refused)
When you see 'Windows Defender service not starting – connection refused', it usually means the s...
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Browse labFix Windows Search Returning 404 Not Found Error
When you search for a file or app in Windows and click a result, you may see a ‘404 Not Found’ er...
Fix Windows Security Blank Screen in Command Prompt
You open Windows Security from Command Prompt and see nothing but a blank window. This can happen...
How to Fix Windows Defender Stuck Loading in Safe Mode
If you've booted into Safe Mode and Windows Defender won't start, shows a loading spinner indefin...
Fix Windows Defender Rate Limit Error Not Working
If you see a 'rate limit error' in Windows Defender and it's not working properly—scanning fails,...
Fix Windows Activation Version Mismatch via Command Prompt
If you see an error like "The version of Windows you are trying to activate does not match the pr...