Client operating systems

Latest update or service pack

End of mainstream support

End of extended support

Windows XP

Service Pack 3

April 14, 2009

April 8, 2014

Windows Vista

Service Pack  2

April 12, 2012

April 11, 2017

Windows 7*

Service Pack 1

January 13, 2015

January 14, 2020

Windows 8

Windows 8.1

January 9, 2018

January 10, 2023

* Support for Windows 7 RTM without service packs ended on April 9, 2013. Be sure to install Windows 7 Service Pack 1 today to continue to receive support and updates.

As of October 30, 2013, Windows 7 is no longer being marketed as a retail operating System. If you want it, you will have to look for it, and stocks will run out eventually. It will still be available as an OEM pre-installed operating system up to October 30, 2014.

Data extracted from here..

http://windows.microsoft.com/en-US/windows/products/lifecycle 

and

http://www.zdnet.com/microsoft-windows-7-support-and-sales-cutoff-dates-worth-knowing-7000024028/?s_cid=e539&ttag=e539