have a poke around in the power saving settings in the control pannel. anyhow i have a better solution for your pc on idle moments: go to www.find-a-drug.org and join the fight for research in some of the most deadly deseases (yea i know i spelt it wrong) this will run on idle resources or as a screen saver and its great fun. even when just surfing or typing you pc has much to offer idle.