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...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFixing PowerShell Error 0x80070002: File Not Found
When PowerShell fails to start with error code 0x80070002, the system is reporting that a require...
Fix BitLocker High Memory Usage on Windows 11
If you notice that BitLocker is using a lot of memory on Windows 11—sometimes over 1 GB—it can sl...
Fix Outlook 502 Bad Gateway Error from Antivirus Interference
When you see a 502 Bad Gateway error in Outlook, it usually means a network comp...
How to Fix Windows Search Invalid Configuration Error
If you see a message saying "Windows Search has encountered an invalid configuration" or search s...
How to Fix Windows Defender Real-Time Protection Stuck
Windows Defender’s real-time protection sometimes gets stuck—either refusing to turn on after bei...
Topic paths
Quick titles
Fix Remote Desktop Rate Limit Error on Windows 10Repair Corrupted System Files That Prevent Command Prompt from OpeningHow to Restore Outlook Auto-Start After ReinstallUbuntu Task Scheduler Error: Service Not Found – FixTroubleshooting Remote Desktop Token and Certificate ErrorsOneDrive Error 0x8004de40: Service Unavailable FixHow to Fix Teams 502 Bad Gateway ErrorTroubleshoot Edge Permission Denied Error