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. Windows Live OneCare helps protect your computer, and its automated optimization features keep your PC running at its speediest.

System requirements:
* Microsoft Windows XP (Home Edition, Professional, Media Center Edition, or Tablet PC Edition) with Service Pack 2 (SP2) or later, or Windows Vista 32-bit and 64-bit (Home Basic, Home Premium, Business, or Ultimate) operating system (OneCare does not support the Windows XP Professional 64-bit operating system)
* Microsoft Internet Explorer 6 or higher for Windows XP SP2; Phishing Filter requires Windows Internet Explorer 7
* PC with 300 MHz or faster CPU speed
* 256 MB of RAM and 600 MB of available hard disk space; 25 GB of available space reqiured for central backup features
* 56 kbps or faster Internet connection

Download: Windows Live OneCare 2.5.2900.20 Final (1.5 MB) | Screenshots | Homepage