Fresh installed windows is Damaged?

Heres my problem. Its a little long but i really need some advice. This girl at my college downloaded some viruses and badly messed up here computer. I was helping her out and wiped the HDD clean and proceeded to reinstall windows Xp home. Right after i installed it, it was running really slow... I rebooted from the windows xp disc and it said that the install was damaged. How can this be after i just installed it.

I tried reinstalling a couple more times with my windows xp cd and another copy of windows xp pro that i have. I still got the damaged install message. THEN i was reinstalling it again and got some error mid install saying it was missing a file or something. And that it might be a problem with the cd. I just used these cds to reinstall windows on my own computer last week so thats not the problem.

What could be going wrong? I am at a loss. The only solution i can think of is that the harddrive is corrupted or bad now, and that i would have this girl replace it. But again i don't want to tell her to buy a new harddrive and run into the same problem again. Plz give me some advice asap so i can get her up and running soon. Thanks alot.

Ice

I had this problem with my Aunts computer, her Win98 CD would not work, I tried my Win95 CD and even Lindows4.5 it turned out to be the DVDrom was not picking up everything, causing the installs to be currupt OR not even finnish

I swapped out the drive and it worked flawlessly

i also had this problem with a friends pc and we found out it was due to faulty ram