Fix Windows Defender Service Not Starting (Error 0x80070422)
You try to start Windows Defender but get error 0x80070422: “The service cannot be started, eithe...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesWindows Security Dependency Conflict Troubleshooting Checklist
Windows Security can fail to start or update properly when a dependency—like a service, driver, o...
Fix 'Access Denied' When Running PowerShell Scripts
If you see Access Denied or UnauthorizedAccess when running a P...
Fix Windows Update Error 0x80070020: Port Already Allocated
When you see error 0x80070020 during a Windows Update, it usually means a program is already usin...
Fix Windows Terminal Connection Refused After Update
After a Windows or Windows Terminal update, you might see "connection refused" when trying to ope...
Fix 'Permission Denied' When Running Scripts in Command Prompt
When you try to run a script in Command Prompt and get a 'Permission denied' error, it usually me...
Issue queue
SitemapReduce BitLocker CPU Usage on TPM-less PCs
Windows Update Token Expired Troubleshooting
How to Fix RDP Permission Denied
Fix OneDrive Version Difference Not Syncing
Android Cloudflare DNS Not Working: Quick Fixes
Fix 429 Too Many Requests in Command Prompt
Resolve Task Scheduler Error 0x80070002
Fix Windows Terminal Setup Blank Screen Issue
Fix Outlook High CPU Usage by Disabling Add-ins
Fix Windows Update Stuck at Checking for Updates – Step by Step
Fix Windows Update Not Connecting to Service
Troubleshooting PowerShell Service Unavailable
Windows Update Token Expired Troubleshooting
How to Fix RDP Permission Denied
Fix OneDrive Version Difference Not Syncing
Android Cloudflare DNS Not Working: Quick Fixes
Fix 429 Too Many Requests in Command Prompt
Resolve Task Scheduler Error 0x80070002
Fix Windows Terminal Setup Blank Screen Issue
Fix Outlook High CPU Usage by Disabling Add-ins
Fix Windows Update Stuck at Checking for Updates – Step by Step
Fix Windows Update Not Connecting to Service
Troubleshooting PowerShell Service Unavailable