Might be of interest to some. Usually £37.99
This is an introductory price on Microsoft's protection package. It can be installed on up to 3pc's so ideal for home networks :)
Worked ok when I used the trial.
Full details here :-http://onecare.live.com/standard/en-gb/prodinfo/default.htm
Introducing Windows Live OneCare, the all-in-one, always-on PC care service from Microsoft. It works quietly in the background on your computer, so you don't have to worry about nasty interruptions from viruses, spyware, hackers, and other unwanted intruders. It also goes beyond security, regularly backing up all your important files and cleaning up and tuning up your computer to help keep it running at top speed. Because you have better things to do with your PC.