NIS 2012 Performance - Not Flipping

Hi. I search but didn't see answer for this. I installed NIS 2012 on four Windows 7 64 bit computers in the past month. Two I installed about a month ago and are okay. The other two installed I installed in the past few days and I have a problem where the performance button doesn't flip the windows, but instead opens a new window. Both of these intalls were clean installs.