I'm having trouble with my Tone Port UX1. Ever since I upgraded to Windows 8.1, the sound crashes after a while when listening to music (in winamp) via the Tone Port device. Also, it is not possible to simply restart the computer as it stops at the 'restarting' screen. After switching off the computer manually and restarting, sound is back but the same problem occurs after a few minutes. However, this never happens when I just use my laptop's 'normal' output for my headphones. I ran Monkey and had the newest software installed, but I still get the same problem. Could someone help me, please?