Creative X fi Xtreme gamer problem

Hi there, I’m new to this forum…

I have an X fi xtreme gamer, it was working fine, then I recieved my 1tb hard drive, installed windows on there, using it as my primary hard drive, since then if I play anything in High Definition, either 720p or 1080i I get this awful crackley sound, I have tried uninstalling and re-installing the drivers many times, I’ve tried using it in XP, Vista and Windows 7 (it worked once in windows 7 then decided to make horrible noises again when playing something High Definition), I’ve tested another x fi on my computer…it did the same thing, I have tried switching it around using a different PCI port but still no luck, and I’ve also tested out a Auzentech X Fi Prelude 7.1 and I’m still having the same problem!!!.. I tested out the card in my friends PC and it had no problems at all…I do not understand why it used to work fine about 3 days ago but then decided it didnt want to play anything in High Definition very well, Music, avi files and games are absolutley fine, it’s only in High Definition it makes horrible crackley sounds. Any help would be very much appreciated.