I am presently own a Gateway Mutli Media center & installed a AVerMedia card. I recieved an e-mail from a Tech & he states that I must remove one of the cards. I am afraid if do I will srew up my computer. Would it help to hook up my TV to my computer even though I ahve one in system ? I am having audio & visial problems with my system now. Can you advise me? Do I need to install DVDXMaker? Would that help ?