For about a year or so, I had my Win7/64bit machine setup where Windows Media Center would change the channel on my Motorola HD QIP 7100 for me with the IR Blaster I had hooked up to my pc. Every now and then I had to unplug it from the USB port for one reason or another. When I did that, I was forced to uninstall the drivers for the IR Blaster, reboot the machine, plug it in again, and let it auto-install the drivers for me. Now for some reason, no matter how many times...