Windows Defender 502 Bad Gateway: Setup and Troubleshooting Guide
When setting up Windows Defender or updating its definitions, you might encounter a 502 B...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix 'Windows Defender Module Not Found' Error
If you see 'Windows Defender module not found' when trying to open Windows Security or run a scan...
How to Fix Windows Update Error 404 Not Found
You see error 404 when checking for updates in Windows Update. This usually means the update serv...
How to Fix PowerShell Failed to Start on Windows 10
When PowerShell fails to start on Windows 10, you may see an error message like "Windows PowerShe...
BitLocker Drive Encryption Stuck at 0%: How to Fix
You start BitLocker encryption on a drive, but the progress stays at 0% for an extended time. Thi...
How to Fix BitLocker Error 0x8031004a
If you see error 0x8031004a when enabling or managing BitLocker, it usually means the Trusted Pla...
Topic paths
Quick titles
Fix Scheduled Tasks That Miss Their Start TimeFix "7zip Cannot Open File as Archive" Permission Denied ErrorSetup Windows Defender to Trust an SSL CertificateFix Chrome ERR_TUNNEL_CONNECTION_FAILED on Windows 10How to Fix Chrome Sync Configuration InvalidResolve Task Scheduler Missing File ErrorOptimize Outlook Performance SettingsHow to Resolve Permission Denied in Windows Update Commands