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 listHow to Fix a CMD 'Cannot Connect to Server' Error
When you see 'Cannot connect to server' in Command Prompt, it usually means a network issue, a fi...
Fix Windows Update 502 Bad Gateway Due to DNS Configuration
If you see a '502 Bad Gateway' error when running Windows Update, the problem is often on the net...
How to Fix Windows Terminal Not Opening on Mac
If you're trying to open Windows Terminal on a Mac and nothing happens, you're likely running Win...
Fix PowerShell Crashing on Windows 10: Step-by-Step Guide
If PowerShell keeps crashing on your Windows 10 system—closing unexpectedly, freezing, or throwin...
Fix Chrome Token Expired on Login Error
When you see a "token expired" message during login in Chrome, it usually means the authenticatio...
Topic paths
Quick titles
Chrome Extensions Not Loading on Mac: Troubleshooting GuideHow to Get PowerShell Running on UbuntuHow to Resolve Outlook Permission Denied During SetupHow to Change Windows Update Service Log On AccountBitLocker Update Hanging at 0%: Troubleshooting GuideWindows Terminal settings.json Missing or Corrupted FixStep-by-Step Checklist for Windows Activation Invalid ConfigurationChrome Network Error Android Troubleshooting Guide