I bought the Creative USB sound blaster and plugged it in. But, every now and then the sound cuts out for a few seconds. Its getting really annoying - is it the card, or the computer?

Are you using the sound card through a hub? If you are, then chances are that other devices are using up the bandwidth (ie external hdd). I suggest you try and plug it into one of the ports on the back of your computer.:thumbup:

Or buy a better hub...