Okay, so I recently built a new computer. I have 4 gigabytes of RAM, a duel core 3ghz processor, a 1 gig ram video card, a 300gig hard drive(IDE) (from my old computer), and a lightscribe dvd drive (SATA). The problem that I'm having, now that I've set up my computer, is that whenever I run a PC game from it's disk, it will suddenly slow down during gameplay, and the audio will keep going but it's slow and kinda skippy.(I've tried games that don't use a disk, like online games using a client, and they seem to work just fine). I can't figure out what's wrong with the computer, when it's not slowing down, the graphics and gameplay are beautiful and smooth. I'll note that it seems to slow down more on newer games (like C&C 3: Tiberium Wars or The Sims 2) than older games (like Giants: Citizen Kabuto). And, in case it's significant, my hard drive failed recently due to a problem with the boot sector that I couldn't fix with the windows recovery disk. It's working now, and I'm running Vista and such, no problems so far other than this game-lagging or whatever. Help?