“Registration for the Windows Upgrade Offer is only for those who buy an eligible Windows 7 PC between June 2nd and January 31st, 2013.

“Did you already buy an awesome Windows 7 PC prior to June 2nd (or have a Windows 7 PC not eligible for the offer)?…Starting on October 26th, you will be able to upgrade to Windows 8 Pro for $39.99!”

http://windowsteamblog.com/windows/b/bloggingwindows/archive/2012/08/20/windows-upgrade-offer-registration-now-available.aspx

https://windowsupgradeoffer.com/

BEFORE YOU PURCHASE A NEW COMPUTER, check to see if you can upgrade to Windows 8 for about 15-bucks.

“…The Windows Upgrade Offer provides consumers who buy an eligible Windows 7 PC the option to purchase a downloadable upgrade to Windows 8 Pro for an estimated retail price of just $14.99 (U.S.)…

“This program…is available for consumers buying new Windows 7 PCs that are preinstalled with Windows 7 Home Basic, Home Premium, Professional or Ultimate and include a matching and valid OEM Certificate of Authenticity. The Windows 7 PC must be purchased new during the eligibility period June 2, 2012–Jan. 31, 2013, and redeemed before the program expiration at the end of February 2013…”

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I have been using Windows 8, and feel the need to warn you that I believe some will LOVE the new interface…and for others, it can interfere with productivity. As much as you can, be sure you are ready to be committed to Windows 8 before you install it.