https://www.WindowsUpgradeOffer.com
Requires Windows 7 (any one)
put in your info and date of purchase
(has to be after Jun 22 or so)
PC brand, where u bought etc.
i just BSed it all and used a legit email.
they will email you again when you can Download Win8
I don't know when that is.
you will have to download and pay through the PC you wish to upgrade.