How to Fix Windows Defender File Locked Error 0x80070020
Error 0x80070020 often appears when Windows Defender (Microsoft Defender Antivirus) is scanning a...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Fix Windows Update Connection Refused by Antivirus
You click Check for updates in Windows, and instead of progress, you see an error like "Connectio...
How to Fix Windows Search 502 Bad Gateway Error
If you see a 502 Bad Gateway error when using Windows Search, it usually means the search service...
Fix OneDrive Permission Denied Sync Errors
You see a red circle with a white cross on your OneDrive icon, and hovering over it shows "Permis...
Fix OneDrive Sync Stuck on Processing Changes
You open OneDrive and see the status stuck on Processing changes for minutes or hours. F...
How to Fix Windows Activation DNS Error
You try to activate Windows, but get a DNS error. The system can't reach the activation server. T...
Issue queue
SitemapHow to Solve SSL Certificate Error in Windows Search
How to Reduce Windows Security CPU Usage
Windows Defender False Positive Fix Guide
Fix DNS Errors by Configuring Windows Security
Windows Command Prompt Setup Guide for Beginners
How to Make Command Prompt Run at Startup in Windows 10
Teams Offline Installer Not Starting Fix
How to Resolve SSH Publickey Authentication Failure
How to Resolve Windows Security Connection Error
Windows Update Command Missing on Windows 11
Outlook Dependency Conflict Troubleshooting Checklist
Resolving Maven Dependency Failures in CI
How to Reduce Windows Security CPU Usage
Windows Defender False Positive Fix Guide
Fix DNS Errors by Configuring Windows Security
Windows Command Prompt Setup Guide for Beginners
How to Make Command Prompt Run at Startup in Windows 10
Teams Offline Installer Not Starting Fix
How to Resolve SSH Publickey Authentication Failure
How to Resolve Windows Security Connection Error
Windows Update Command Missing on Windows 11
Outlook Dependency Conflict Troubleshooting Checklist
Resolving Maven Dependency Failures in CI