Are you being deliberately dense?
Okay, try this.
Windows 7 was released in 2009, and will get security fixes until 2020.
Even Windows Vista (released in 2007 for home) will get security fixes until 2017.
Let's look at phone versions instead:
Windows Phone 7 was released in October 2010 and left support in October 2014.
Windows Phone 8 was released in October 2012 and will be supported until January 2016.
Looks like Windows users are getting a little better support from their supplier.