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 listFix Windows Search SSL Certificate Error Configuration
If Windows Search stops working and you see an SSL certificate error in the event logs or search ...
Chrome Profile Configuration Troubleshooting Guide
You open Chrome and see a profile error, get a message that your profile can't be loaded, or noti...
Fix PowerShell Crash After Installing a Module
If PowerShell crashes or hangs right after you install a new module, you're not alone. This often...
How to Repair the Windows Search Indexer Service
If Windows Search stops returning results, takes forever to find files, or shows no results at al...
Fix Windows Security Virus Scan Slow Performance
If your Windows Security (formerly Windows Defender) virus scan takes forever or slows down your ...
Topic paths
Quick titles
How to Fix Chrome Update Error 12 (No Reset Needed)Fix 'Invalid Configuration Permission Denied' in Command PromptOutlook Update Troubleshooting Checklist: Fix Common IssuesWindows Terminal Stuck in Login Loop? Fix It HereFix BitLocker 404 Not Found ErrorFix Microsoft Teams Blank Screen Error CAA70007Troubleshooting Outlook Sync After UpdateTask Scheduler Error 0x80070057 After Update Fix