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 ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Search Authentication Failed After Password Change
After changing your Windows password, you may see an error like “Windows Search authentication fa...
Fix High RAM Usage After Chrome Sync Update
After a recent Chrome update, you might notice the browser eating up significantly more RAM, espe...
Fix Windows Store Error 0x80073cf9: Configuration Issue
When you see error code 0x80073cf9 while trying to install or update an app from the Windows Stor...
How to Fix Chrome ERR_CONNECTION_RESET Proxy Error
If you see "ERR_CONNECTION_RESET" in Chrome when trying to visit a website, it usually means the ...
Fix Windows Activation Blank Screen in Safe Mode
If you see a blank screen after entering Safe Mode to activate Windows, you're likely stuck in an...
Topic paths
Quick titles
How to Configure Microsoft Teams BackupHow to Fix PowerShell Authentication Failed ErrorsFix Missing DLL Errors in Command PromptMicrosoft Teams 502 Bad Gateway Error: Troubleshooting ChecklistTeams 504 Gateway Timeout: Permissions Fix GuideFix Command Prompt High CPU Usage After Closing CMDFix Windows 10 Activation Error 0x8007232b (Version Mismatch)Windows Activation Failed: Troubleshooting Checklist