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Old March 20, 2009, 04:31 AM
floodx floodx is offline
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Join Date: Mar 2009
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I haven't dealt with upgrade versions of OS's since 95/98 days, however I would assume you would need a previous version of Windows (you did back then). My reasoning for this is simply because the upgrade versions are cheaper, which I would assume is made possible because you've already dished out money for a previous OS and thus Microsoft sort of "rewards" you with a discount.

EDIT: The upgrade version would still be the "full" version of vista (vista is completely recoded and doesn't run of XP's base, ie. like how 7 runs of vista's base). However, it won't install without first seeing there's a previous OS to validate the whole discount part of things. This is also all just speculation and guess work on my part though.
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