The oem is on the old pc
and you could download it with a trial microsoft OS installed so its not a case of needing a liscence
What version are you trying to install, just becuase you can download it, doesn't mean that's what it's designed for.
Tell us what version you are trying to install.
Iif it is this one
http://www.microsoftstore.com/store...o-Upgrade---Student-Offer/productID.272002100
Then youa re meant to have XP sp3, vista or win7 installed on the machine with a valid license and the upgrade will be simple.
If that's the one and you don't have one of those is talked then that version is not for you and hence you are struggling, nothing to do with MS making it difficult, everything to do with you not having a valid license.
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