Fix Windows Defender Service Not Starting Error
If you see an error that Windows Defender won't start—or the service stops immediately—it's usual...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Windows Security Not Working on Ubuntu
You're running Ubuntu and see an error that Windows Security isn't working. This usually happens ...
Checklist for Windows Update Connection Refused Issues
When Windows Update fails with a "connection refused" or "server refused connection" error, it us...
Fix Microsoft Store Auto-Start Not Working After Windows Update
After a Windows update, you may notice that apps from the Microsoft Store no longer start automat...
Fix Windows Activation Module Missing Error
You see a message that the Windows activation module is missing or not found, often when trying t...
How to Fix Windows Security Version Mismatch Configuration Error
You may see a “version mismatch” or “configuration error” in Windows Security (formerly Windows D...
Topic paths
Quick titles
How to Enable Windows Security Service After Manual StopHow to Fix Chrome Profile Error 0x80070005Command Prompt Error 5: Access Denied FixFix Java JDK Not Recognized on Mac: Step-by-Step GuideTroubleshoot PowerShell Authentication to Active DirectoryChrome Profile Error Fix: Create a New ProfileMissing Chrome Profile Error TroubleshootingFix Windows Search Blank Screen: Restore Default Settings