I have come across number of topics involving these types of keys, but, the information that is provided is conflicting. I did some research on MSDN and I understand how they can be used and by whom as specified by MS EULA. However information regarding number of times each key can be used and the number of machines it can be installed is unclear. Some state that MSDN key can be installed on one machine only with up to 10 activations, whereas others claim that MSDN key can be installed on up 10 machines with unlimited number of installations? Yet others state that each can be used up to 10 times on 1 machine X 10 activations or 10 machines X 1 activation. Does anyone have actual information about these keys.