I have an old Tekvisions 710A touchscreen, and I've successfully had it running under Windows 7 32 bit RTM for over a year. However, I just tried to run in under Windows 8 64 bit, and it won't work; likely because Tekvisions never released a 64 bit driver.
I am confident I can get it running under Windows 8 32 bit, based on past results.
Make sure you install the .exe in XP compatibility mode, and as Administrator. That's how I got it working under Win 7.