Reinstalling older NIS after Windows 7 upgrade.

We originally installed NIS 2007 on our home PC (running WinXP SP3), and later my wife's laptop (Windows Vista Premium) and have maintained a Norton Account on both.

 

She recently had the laptop upgraded to Windows 7 Premium which required a clean install.  This meant reformatting the C: drive and losing all the third party software installed.

 

We've tried reinstalling NIS using the 2007 CD, but Windows 7 will not allow it to be installed, and would like to know how to get NIS back on her laptop.

 

Thanks!