Windows 7 upgrade / clean install

[damageinc24]

I have a windows 7pro upgrade key that ive never used. Is it possible to use it on a clean install, on a brand new hdd?

Also would it be possible for me to to use a key from win7 home ed from a pc that broke down?...

 

[13thmonkey]

it may want to see a previous windows disk in order to upgrade.

 

[nikorr]

Yes, this is the way to do it... U also need to have a valid Win XP or Vista licence.
http://www.winsupersite.com/article/win7/clean-install-windows-7-with-upgrade-media