I went to add a few things to the new Windows 7 desktop today, and of course I have installer issues. I'm trying a few things, and need to post what works.
I did solve my screen saver issue. Apparently lots of USB mice and keyboards don't allow the screen saver to activate, which was my issue. I downloaded updated drivers for 64-bit for my Microsoft Wireless Laser Mouse 5000 and it's now working.