One of the great things about Windows Server 2008 (and Vista, I think) is that you can install the OS without the need of a product key. When you do, the product is installed in “trial version” (fully functional 60-day trial). After the 60 days you need to register or Windows Server 2008 will stop working…or so you would think 
Did you know that with a neat trick you can actually extend the 2008 evaluation period? Yes you can, actually you can have 240 glorious days of evaluation on any Windows Server 2008 version – how sweet is that? And no, the link that shows you how to do this is not a hacking site; it is (drumroll) an MSDN link!
Yup, just follow the instructions here:
http://support.microsoft.com/kb/948472
And you will be able to extend the evaluation period. Enjoy! 
