Wow, I just looked it up, support ends in less than a year from now, who do they think they are, HTC?
Windows 7 Service Pack 1
End of mainstream support January 13, 2015
End of extended support January 14, 2020
Windows lifecycle fact sheet
And MS just announced last week that XP will keep offering anti-malware updates until July 2015 (Microsoft: Windows XP anti-malware support to last into 2015)