Hi, my Mother's computer's hard drive has crashed for the second time, It had Vista on it and It's only 2 years old. It is going to cost them a small fortune to have it repaired. So they have bought a new hard drive and i was going to put WIN XP on it for them, will i have any problems in doing that. I know it's a compaq desk top computer, and it has 500 megs of ram give or take i know it's in the 500's know more when i get to their place tomorrow. Bit concerned.