Fix Windows Defender Service Not Starting (Error 404)
If you see error 404 when trying to start Windows Defender, it usually means the service executab...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Windows Activation Update Error 0x8007000d
When you try to activate Windows or install an update, you might see error code 0x8007000d. This ...
Fix Windows 10 Update Not Downloading: Practical Steps
You click 'Check for updates' in Windows 10, but nothing downloads. The progress bar stays at 0% ...
Fix Windows Activation Service High CPU Usage on Windows 10
If you notice your Windows 10 system running slowly and Task Manager shows high CPU usage from 'W...
Fix Windows Defender Not Working After Update
After a Windows update, you might find that Windows Defender (Microsoft Defender Antivirus) is di...
How to Fix Microsoft Store Crashing on Launch
If the Microsoft Store crashes immediately when you try to open it, you're not alone. This is a c...
Topic paths
Quick titles
Troubleshooting Permission Denied on Windows 10Resolve RDP Authentication FailureFix OBS Black Screen with Elgato Capture CardTroubleshoot BitLocker Crashes Post-UpdateChrome Profile Error Fix: Create a New ProfileWindows Terminal Troubleshooting ChecklistForce Close Stuck Windows UpdateMicrosoft Store Invalid Configuration After Windows Update Fix