Microsoft has announced that it will end mainstream support for Windows 7 and Windows Server 2008 on January 13, 2015.
What does this mean?
First, don’t panic. There’s no need to rush to deploy Windows 8. This only means that Microsoft will no longer provide free products updates and improvements on date. You will have to pay for those. They will continue to provide security patches well past then. We should continue to expect Windows 7 security patches every Patch Tuesday for an additional 5 years after that date. More detail here: Products Reaching End of Support in the Second Half of 2014 Note that also on that list is Exchange Server 2010 and an EOL announcement for SMS 2003.