I have a previous version of Windows on my current PC (that died) but lost my XP CD. Can I use my code from my XP CD to upgrade to Vista and just buy the Home Premium Upgrade box to use my MacBook?
According to the Windows end user license, you cannot "upgrade" to Vista a different PC and still have the XP on the original PC. There is still only one license in play. To install Windows you need to purchase a new license of Windows for the Mac.
The OP did say the PC died, though that doesn't mean it's 100% in line with the EULA since it was probably an OEM license and thus not did not come with transfer rights.
B
I purchased a full version of XP when I built my own PC which has since died.
So would it be physically possible for me to install Vista with the upgrade disc? I can always get a product key from school at a discount if it doesn't work.