My copy was obtained via my work place through MSDN, a product key was supplied with it, but wa never required during installation,and I can no longer find it. When logging on this morning, Windows has stopped working, sugesting I haven't got a genuine copy of Windows, which obviously I have because its from MSDN. How can I get hold of Microsoft to activate this product ( I can assure Microsoft if they are reading that I will not be paying for a new product key or licensing).
Someone help 