Backup copy of Windows 7 allowed on same computer?

Another Thanks

Distinguished
Oct 11, 2010
30
0
18,540
Hadn't really seen it in writting anywhere. I'd like to just do a clean install of Windows 7 Pro on a new drive for the same computer and use the previous drive for storage. But want to make sure everything goes well first. Thanks for any advice.... Oh and it's the windows 7 pro OEM system builder pack version.