I copied the TASCAM CD onto my hard drive from an external CD drive, then ran the install program Autorun2.exe from the autorun folder. I am on a MS Surface with 1 USB port, and my external CD drive won't run through the USB extender I have. Hence copying the CD. The drivers worked fine in Win 8.1 and now in Win 10. I had to reinstall them after I upgraded from 8.1 to 10. The Playback and Record system settings include the Tascam when it is plugged in.