HI, I hope someone can help me.

I have a new computer, a Quad-core processor, graphics Nividea GE-force 8500GT, XP.  When l loaded everything (l have all expansion packs, some stuff packs) up to Bon Voyage, it kept crashing and then became unplayable.  I unloaded it, updated the video card, and reloaded.  It works fine now, except l cannot load Seasons or Pets.  The second disk on both these packs will not load, and you cannot do it through windows explorer.  They load fine on the old computer, l have tested it.

Question, is it the processor?

What to do?

Thanks