Take a breath and verify these three things:
| Error Message | Cause | Solution | | :--- | :--- | :--- | | Setup failed – .NET Framework missing | Windows is outdated | Run Windows Update, or download .NET 4.8 from Microsoft manually. | | Dongle not found (Error 7) | USB driver conflict | Reinstall Sentinel drivers. Try a different USB port (avoid USB 3.0 hubs). | | Unhandled exception at startup | Corrupt user profile | Delete the folder %APPDATA%\FastCAM and restart the software. | | Trial expired | Previous installation | Clean registry using Revo Uninstaller, then reinstall. | | Antivirus deleted fastcam.exe | False positive | Restore from antivirus quarantine. Add the FastCAM folder to exclusion list. | fastcam software download
Go directly to fastcam.com/downloads (do not use search engine ads—many are malicious). Request your trial, verify the file hash, and follow the installation steps above. Take a breath and verify these three things:
This is the most common issue after a fresh download. It usually means the driver failed or the USB port isn't providing enough power. Try a port on the back of the PC rather than a front-panel hub. | | Unhandled exception at startup | Corrupt