If you are thinking about upgrading your current Microsoft OS to Windows 7, be prepared. It is not straight forward kind of upgrading. For XP users, good luck as you need to do a Clean install, which means all your information will be wiped out. For Vista users, it depends on which Vista package that you have. More information after the break.
Microsoft has used a very nice term to tell you that you need to have a clean install. It mentions Custom Install. If you read the definition properly, it means a clean install anyway…
Click Here to See the Fine Print
Or if you are still unsure, let Microsoft helps you. I think I will wait since there will be a lot of incompatibilities on software out there.
Can My PC Run Windows 7?
[ad#boxlist]
(source)