If using RS-232:
Do not use random CD-ROMs. Download a trusted generic driver (e.g., from SignCut , Sure Cuts A Lot , or a reputable vinyl cutter forum). Look for files named MH721_Driver.exe or USB_Serial_Driver.zip . cutting plotter 721 driver windows 10
) on Windows 10, the "driver" is typically not a traditional printer driver but rather a USB-to-Serial chipset driver If using RS-232: Do not use random CD-ROMs
: Right-click the Start button and select Device Manager . Sure Cuts A Lot