It has been two years since the release of Windows 7 Service Pack 1 and Microsoft would like to remind those who are still running Windows 7 (without SP1) that the operating system will no longer be supported starting April 9th of 2013. If you are running SP1, you are still good for a while.
"Windows 7 RTM (with no service pack) will no longer be supported as of April 9th, 2013, following the standard Windows support lifecycle specifying that support ends 24 months after the release of a new service pack. Rest assured that Windows 7 will continue to be fully supported for a long time, with mainstream support continuing until January 13, 2015, and extended support continuing until January 14, 2020," Microsoft stated in an official blog post. Windows 7 SP1 will continue to receive mainstream support until 01/13/2015 and extended support (paid security updates) until 01/14/2020. Take a look at the chart below to see the support dates for each edition of Windows 7: