Windows Defender 502 Bad Gateway: Troubleshooting Checklist
If you see a 502 Bad Gateway error when opening Windows Security or trying to update Windows Defe...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix 'No matching distribution found' Error on Windows pip install
When you run pip install somepackage on Windows and get ERROR: Could not find ...
How to Set Up Remote Desktop on Windows 11
Before You Start
Remote Desktop lets you connect to your Windows 11 PC from another devic...
Windows Defender Real-Time Protection Off but Still Scanning: Fix
You turn off real-time protection in Windows Defender, but scans still run. This can be confusing...
Fix Windows Update Stuck at Blank Screen During Automatic Repair
You're running Windows Update, and after a restart, the screen goes blank—no cursor, no logo, jus...
Fix Microsoft Teams Authentication Failed Error
You open Microsoft Teams, try to sign in, and get an 'Authentication failed' error. This usually ...
Topic paths
Quick titles
Fix OneDrive DNS Error 0x8004de40 – Step-by-Step GuideHow to resolve unknown directive server_name in NginxWindows 11 Activation Error After Hardware UpgradeRDP Connection Error: Causes and FixesOutlook 404 Error: Quick Fixes for Windows 10Windows Search Service Won't Start Error 1068Resolve Microsoft Edge Update Permission IssueTroubleshoot GitLab Runner Permission Denied Error