With Halloween around the corner, to get in the mood, you might want to check out this Jack-o-lantern Halloween screensaver for Windows 7. “Watch as different faces are carved into jack-o-lanterns.”
This screensaver is spyware free and you can download it from AmericanGreetings.com for free, although you will be asked to submit your email id.
Screensavers are a vector for spyware and adware and one must therefore be very careful while downloading and installing them.
These Halloween themes for Windows 7 may also interest you!