End of support refers to the date when Microsoft no longer provides automatic fixes, updates, or online technical assistance. This is the time to make sure you have the latest available service pack installed. Without Microsoft support, you will no longer receive security updates that can help protect your PC from harmful viruses, spyware, and other malicious software that can steal your personal information. For more information go to Microsoft Support Lifecycle.


 




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For Windows XP End of mainstream support: April 14, 2009




For Windows Vista End of mainstream support: April 10, 2012




For Windows 7 End of mainstream support: January 12, 2015


 


 




For Windows XP End of extended support: April 8, 2014




For Windows Vista End of extended support: April 11, 2017




For Windows 7 End of extended support: January 14, 2020


 




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Two years left for me (I'm using XP).