Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

So I just reinstalled Windows 7 on my dad's PC. The thing is i accidently installed Win 7 Ultimate (x64). The key (legit key) I have is for Win 7 Professional (x64).

What are my options. I do have the ISO for Win 7 professional also. Is it just cleaner and safer to reinstall Win 7 professional? how bad is it on the harddrive? the harddrive is fairly new.

share|improve this question
up vote 10 down vote accepted

Reinstalling will be no problem for your harddrive as you will only be rewriting a small percentage of the disk.

It also seems like the simplest option for you.

share|improve this answer
Just make sure you do it before you set everything up, otherwise it's a bother. But since modern HDDs are meant to run with years of use, rewriting a few gigs at the start won't even dent it. – ssube Nov 6 '10 at 20:44

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .