The link I posted earlier didn't work correctly. Let me try that again. This should list only Win7 computers.
Best Laptops & Notebooks - Newegg.com
Nope. Didn't work right. So....
On the left side of the screen click Advanced if isn't already highlighted then go down to Operating System in that list. Choose one of the Windows 7 versions and the choices will automatically change to only show that version of windows as the OS. Usually it keeps that info when I create a link, but it's not doing it for some reason.