I was looking at getting windows 7 and hoping to do clean installs on a couple of machines and don't know which version to choose. I was looking at the w7 professional upgrade because I read that you can do a clean install with the upgrade disc and it's cheaper but I was not sure because I have an xp pro upgrade disc which says in the manual you can do a clean install but I could not (tried to put it on my laptop and do a clean install over vista but wouldnt let me.) If you can do that, what is the difference between an upgrade clean install and the regular install disc? My other question is, if I buy the full retail version how many machines can I install it on and will they go into non genuine mode after the product key is used once?
thanks
thanks