I don't know, if there is already a thread on this topic.
Unfortunately, Nikon is not willing to provide any customer service to owners of Nikon scanners and to update its Scan software and drivers for Win7. Statement on Nikon's web page is simply
"The use of Nikon Scan software with Windows 7 (any version), or Mac OS 10.5.x or later, or any 64- bit operating system (including 64-bit, 32-bit or Compatibility mode) is not supported.
We suggest trying a third party software option such as Vuescan from Hamrick.com or Silverfast software."
As I actually don't really like the suggested solutions and as I am not really in the mood to spend a couple of 100 bucks on new scan software, does any of you have experience with any other scan software that would work with Nikon scanners?