Microsoft Security Essentials (codenamed Morro) is a free antivirus software created by Microsoft that provides protection against viruses, spyware, rootkits, and trojans for Windows XP, Vista, and 7. Microsoft has always recommended that its users use real-time antimalware protection, but the release by the end of this year will mark the company's first free solution.

Learn about Windows Live OneCare
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.
All-in-one protection and maintenance
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

Protect, maintain, and manage your computer with Windows Live OneCare, the always-on PC-care service from Microsoft. Working quietly in the background on your computer, OneCare protects against viruses, spyware, hackers, and other unwanted intruders. New features allow for multi-PC management to form a circle of protection, printer sharing support, and centralized backup of up to three PCs covered under the same OneCare subscription.

Here is what’s new on Windows Live OneCare:
* Multi-PC and home network management
* Printer sharing support
* Start time optimizer
* Proactive fixes and recommendations
* WiFi Security
* Centralized backup
* Online photo backup