Watch out for the MS Upgrade scam. It’s just a way for MS to upsell upgrades. The deal is, if you bought a PC between June 2012 and the release of W8 you could get a downloadable upgrade for $15. What they don’t tell you is that 1) you can’t install without W7 being installed unless you buy the full upgrade (which isn’t a full upgrade) and 2) the download is 32 bit only (again, 64bit only in full upgrade which isn’t a full upgrade). The full upgrade that isn’t a full upgrade (their words) costs $199.
When I told the clown most systems sold during the qualifying period were most likely 64bit, he told me that was my opinion.
When I told him he was a liar and a scammer, again I was told that was my opinion.
Save yourself time and mark the e-mails as SPAM.