If you're interested in getting the latest One Care for a bit of a discount.... Costco Online are selling the (usually $39.99) package for $30 off - that's only $9.99 for a years protection for up to three machines.
Check it out at Costco before Jan 2 2008.
What is Windows Live OneCare?
The All-in-One Security and Maintenance Service for your Windows XP or Windows Vista-based PC
Windows Live OneCare helps protect your computer, and its automated optimization features keep your PC running at its speediest. OneCare even regularly backs up your important files. You get all this in one convenient package:
Protection Plus, with its antivirus and antispyware scanners and managed, two-way firewall, helps protect your computer from viruses, worms, Trojan horses, hackers, and other threats. It runs continuously in the background, but you can scan individual files, folders, and even attachments you receive via Windows Live Messenger for viruses on demand. In addition, OneCare protects you from online scams and identity theft by ensuring you have Microsoft anti-phishing technology installed and enabled.
Performance Plus regularly defragments your hard disk, removes any unnecessary files that can clog your PC, and helps make sure important security updates from Microsoft are installed efficiently and on time.
Backup and Restore regularly copies your important files to CD, DVD, external hard drive, local network computer, and USB connected storage devices.
Help Center includes email, chat, and phone support at no extra cost to subscribers.