Hi, My audio was working well, but i decided to start recording find a way to improve my outbound audio quality (i'm an audiophile). I purchased a Fast Track Pro. Unlike other threads I've read, I'm not seeing any BSOD and its not crackling. My operating system will just stop functioning, or freeze for a half a second at a time. This can become frequent at about 10 times in a thirty second period requiring a restart. I had installed the latest x64 driver for my W7 x64 system from M-audio's website. I uninstalled the driver and restarted, the issue persisted. I then installed the on-board audio driver and restarted, no system lag is present. The audio device-driver is acting up and I'm not sure why. Because i bought it used M-audio's support is a no-go. Are there any additional steps I can take which may troubleshoot this issue? Thank you.