Just found that
Windows Live One Care is free after a $30 rebate on
Amazon. This is kind a one-for-all product that MS has had for a couple of years now. Usually I would use AVG since it was free, but last year I thought I would give this a try and have been happy with it. The license on it will let you install it on up to three pc's and provides antivirus, spyware protection, schedules scandisk/defrags, and automated backups. Most of these things you can do in Vista but for the average user One Care does it all for you easily.
They have a free 90 day trial for it if you want to try it out. I was contemplating if I wanted to renew it for a $50 price tag but you can't beat getting it for free!
Source