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Fix Windows Defender 404 Not Found Error on Windows 10

You click to open Windows Defender Security Center and see a 404 page, or the Settings app shows ...

Certbot Nginx Plugin Troubleshooting Checklist

When Certbot's Nginx plugin fails, you typically see errors like Could not automatically fi...

Set Windows Update Service to Run as Local System Account
If Windows Update fails with errors like 0x80070422 or the service won't start, the service might...

Fix Chrome Profile Service Unavailable Sync Error
If you see the error "Profile service unavailable" in Chrome when trying to sync, it typically me...

How to Reset Windows Search Configuration to Default
If Windows Search stops returning results, runs slowly, or behaves erratically, a corrupted confi...

Fix Windows Defender Real-Time Protection Stuck Off
You try to enable real-time protection in Windows Security, but it either stays grayed out or rev...


    Issue queue
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How to Stop Windows Security from Disabling Itself
Outlook Port Already Allocated Error Fix
Fix Microsoft Store Error 0x80070005: Access Denied
Fix Chrome Backup Restore Permission Denied Error
Fix Windows Defender Not Starting After Update
Windows Activation Error 0x80070057 Fix
Fix 'bitlocker command not found' Error When Enabling BitLocker
Find Command Prompt Log File Location for Batch Scripts
SSL Certificate Error in Windows Defender: Troubleshooting Checklist
Windows Defender 404 in Group Policy Fix
Reset BitLocker to Default Settings
OneDrive Sync Error 0x80070194: Step-by-Step Fix
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