Beginner here, so I'm not sure if it can be done and I haven't been able to find anything about it online. My wife's pc has Vista Ult on an older Seagate 500gb drive which works fine.
I want to upgrade to Win 7, but I have a WD 320gb Blue that I would like to switch the OS to for better performance and the older will become the backup and main storage.
Not even sure if it's possible, but if I have to do a fresh install it simply takes a little longer, with all the updates,..... I'll likely do a fresh install anyway, that's the common sense method, hehe. makes too much sense for it to work...
Just curious to find out if that's even possible.

Edit: There's ghosting for doing multiple pcs with essentially the same thing on every one. Seen it done, but never tried it myself.