Fix 'systemd service failed to start unit not found' Error
When you run systemctl start myapp.service and get Failed to start myapp.servi...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Reinstall Windows Defender in Windows 11
If Windows Defender (Microsoft Defender Antivirus) is missing, disabled, or not working correctly...
Fix Windows Search Settings Not Saving
You change a Windows Search setting—like indexing options or excluded folders—but it reverts afte...
Windows Security Slow Performance Checklist
If Windows Security (formerly Windows Defender) is making your system feel sluggish—slow scans, d...
How to Fix Windows Security Invalid Configuration Error
If you see a message that says "Invalid configuration" when opening Windows Security, the app usu...
How to Fix DISM Restore Health Error 0x80073712
When running DISM /Online /Cleanup-Image /RestoreHealth, you may see error 0x8007371...
Topic paths
Quick titles
Microsoft Store Cannot Connect Proxy Error GuideHow to Fix OneDrive Proxy Error After UpdateHow to Resolve Windows Activation Error 0x80070005Fix BitLocker File Locked in Shared FolderTroubleshooting Microsoft Teams Meeting Join ErrorsWindows Key Not Working After Ubuntu InstallFix OpenVPN Unable to Connect to Remote ServerWindows 10 PowerShell High CPU Troubleshooting