Some years ago I bought a PC running Vista. When Windows 7 became available I purchased an upgrade disc, and subsequently then further upgraded to Windows 8.
Then disaster struck my PC, and I identified the problem as being with the SATA connections (hard drive and DVD RW).
As the mainboard also had an IDE socket, I decided to use an old IDE hard drive and DVD RW and use this to load my OS.
I first loaded Vista (success!) and then loaded Windows 7,also successfully.
The problem is that the software will not activate, as I get the message that "this version cannot be used".
Surely, as the hard drive is the only item changed, the copy should still be legal?
Thanks for replies. When I installed the Windows 7 I did it from Vista, although the "upgrade" option was greyed out and I had to do a "custom(clean)install".
As I am now using a completely different hard drive (SATA failed), there is no record on disc of any prior registration.