I have been contributing to Stanford's Folding@Home project for some time with most of the computers I own.
I just installed the Windows client on a new machine running Windows 7, but see that the F@H process only binds to one CPU core. Is this due to it being run on Windows? (I have the 64-bit edition of Windows 7 installed.)
On the Mac and under 64-bit Linux distros, it will run across all available CPU cores.