Where is the best place to get screensavers from? I have downloaded two and they both came with loads of other programs that completely mucked up my computer and had to do a system restore. So.....

They all come loaded with spyware and browser "helper" objects. These claim to be free.
http://www.screensavers.com/index.html?SS_ID=100_0_0_1&source=p4pgoogle&aff_id=206
You could try sites like http://www.tucows.com/windows.html or
http://downloads-zdnet.com.com/3120-20-0.html?qt=screensavers&tg=dl-2001

What I did was got a copy of SaverWiz - it's a wee program that allows you to mae your own screensaver using some of your own pictures. I knocked up a decent Sevens screensaver - it's very easy to use and didn't trigger Adaware on my PC.
Once run it creates a *.scr file that can be used on any Windows box.
Hope that helps.