This thing and Windows 7 just don't seem to get along for whatever reason. The original one I got had issues with the sound driver crashing. Massdrop sent me a new one and it worked fine for months. Now I'm having an odd issue with Windows 7 and RDP. If I RDP into another computer and play sound on the other computer, at some point, either 5 seconds, 5 minutes or 5 hours, the sound system on the machine I am RDPing from crashes. If I switch back to the internal DAC in the PC, then I get sound back. If I plug in my ODAC, that works just fine. So, definitely something with this DAC.