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 Reset Microsoft Store Settings Without Losing Apps
If the Microsoft Store won't open, downloads hang, or updates fail, resetting the Store can often...
Fix Microsoft Teams Stuck on Loading Screen
When Microsoft Teams gets stuck on the loading screen with the spinning dots, it usually points t...
Fix Windows Defender Proxy Error: Permission Denied
You try to update Windows Defender or run a scan and get an error like "Permission denied"
Fix Command Prompt Restore Backup Error 0x80070002
When using the command prompt to restore a backup, you may encounter error 0x80070002. This error...
Fix Windows Search Offline Installer Error 0x80072ee7
When you try to install Windows Search using an offline installer, you might see error 0x80072ee7...
Topic paths
Quick titles
How to Unlock a File Being Used by Another Program in WindowsFix Outlook Permission Denied Calendar Access ErrorChrome Profile Version Mismatch: Sync Disabled FixWindows Activation Service Unavailable on New ComputerCommand Prompt Keeps Closing – Windows 10 TroubleshootingRemote Desktop Authentication Token Expired GuideTask Scheduler Access Denied: UAC Fix GuideResolve Error 0x80240034 in Windows Update