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...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Chrome Proxy Error 'Connection Refused' (Step-by-Step)
You try to open a website in Chrome and get 'ERR_CONNECTION_REFUSED' or 'Proxy server is not resp...
Task Scheduler Not Running on Windows 10: Fixes That Work
You set up a scheduled task in Windows 10, but it never runs. The status might show “Ready” or “R...
Command Prompt Not Responding? Fix Black Screen Issue
You click on Command Prompt, but instead of a working terminal, you get a black screen that doesn...
Fixing Task Scheduler Invalid Configuration Event ID 101
You open Event Viewer and see Event ID 101 under TaskScheduler with a message about an invalid co...
Fix OneDrive Sync Login Loop on Windows 10
If you're stuck in a OneDrive login loop on Windows 10—where the sign-in screen keeps reappearing...
Issue queue
SitemapFix 7-Zip 'Unsupported Archive Format' Error
How to Resolve Task Scheduler Error 0x80070057
Microsoft Store Not Working After Update: Fix Checklist
Fix Windows Defender Real-Time Protection Turning Off
Troubleshoot Jupyter Kernel Connection
Windows 10 Update 504 Error: Causes and Solutions
Resolve BitLocker Rate Limit Lockout
Troubleshooting Windows Terminal Access Errors
Install Windows Defender on Linux Ubuntu
How to Resolve MySQL Workbench Connection Refused on Mac
Fix Windows Update Error 0x8024402c via Network Configuration
Chrome Sync Permission Denied Troubleshooting Guide
How to Resolve Task Scheduler Error 0x80070057
Microsoft Store Not Working After Update: Fix Checklist
Fix Windows Defender Real-Time Protection Turning Off
Troubleshoot Jupyter Kernel Connection
Windows 10 Update 504 Error: Causes and Solutions
Resolve BitLocker Rate Limit Lockout
Troubleshooting Windows Terminal Access Errors
Install Windows Defender on Linux Ubuntu
How to Resolve MySQL Workbench Connection Refused on Mac
Fix Windows Update Error 0x8024402c via Network Configuration
Chrome Sync Permission Denied Troubleshooting Guide