If you must run a BI-60 on Windows 7, here are the proven methods, ranked by reliability.

Requires the "GCC USB Virtual COM" driver. If Windows shows an "Unknown Device" error, you must manually update the driver in the Device Manager.

: If using third-party programs like CoCut or SignPal, you must manually register the new driver within the application's output device settings (typically found under Settings > Output Devices ). Troubleshooting & Limitations Bobcat BI-60/30 User's Guide - YUMPU

: Once downloaded, run the installer. For 64-bit systems, you may need to ensure you have the latest firmware to support "Common USB Mode".