Microsoft is currently offering promotional pricing for users upgrading to Windows 8 from Windows XP, Windows Vista, and Windows 7. Through January 31st, you can upgrade to Windows 8 Pro for just $39.99 ERP (U.S.) via Windows.com using the Windows 8 Upgrade Assistant or pick up a DVD copy at a local retailer for just $69.99 ERP (U.S.). And if you bought an eligible Windows 7 PC between June 2nd and January 31st, 2013, you can register for the Windows Upgrade Offer and upgrade to Windows 8 Pro for only $14.99 ERP(U.S.). But come February 1st, these prices will be increasing. MORE...