Getting the cheap techstream cables to work on Windows x64
Installing the original drivers doesn't seem to work anymore. Download a new package here and run install.bat as Administrator. It should work on both 32 and 64 bit systems.
After which plug in the cable, open the device manager, right click the adaptor and select update drivers. Instruct Windows to look in the Drivers folder for drivers. Once that is completed TechStream should work :)
A full installation guide is available here