There is a bug in the NSD process claiming that the running operating system would be Windows/2008 R2 6.0 [64-bit].
This is wrong! Windows Server 2008 R2 RTM is Version 6.1 (Build 7600.16385). Version 6.0 is just “Windows/2008”.
IBM support seems to trust their own bugs that much, that support request will be declined, because system requirements may not be given.
[Thanks Christian for even checking this by installing R2]