We always suggest not using the USB, as it has a cheap Chinese chipset, Not TRUE USB like higher end cutters. We suggest using the (Tripp-lite Keyspan adapter)that is the brand name and null modem cable with the MH vinyl cutters, Much better data flow and connection. The MH cutter, is about the most inexpensive vinyl cutter out there. We also suggest new buyers purchase at least the SC2, Much better vinyl cutter. More memory, less static problems, better tracking, better connection.