From the Microsoft Website:
“Every Windows product has a lifecycle. The lifecycle begins when a product is released and ends when it’s no longer supported or sold. Knowing key dates in this lifecycle helps you make informed decisions about when to upgrade or make other changes to your software. Here are the rights and limits of the Windows lifecycle.”
The details of what products will expire and when are available here but the biggest and most relevant information on the page is that MS Windows XP, the flagship operating system from Microsoft for over a decade now is being officially killed off as of April of 2014. This basically means that there will be no further support from Microsoft on these products including bug fixes and, more importantly, security fixes. If you are using any of these products, you are encouraged to upgrade to a newer version as soon as possible.
If you have any questions or if you are unsure of if or how this affects you or your organization, feel free to contact us directly and we would be happy to help.
http://windows.microsoft.com/en-us/windows/products/lifecycle