Microsoft Security Essentials is offered as an optional update

If you are a Small Business customer, find additional troubleshooting and learning resources at the Support for Small Business site.


Are you currently running anti-malware software on your computer? If you are not, you may be vulnerable to spyware, viruses, and other malicious software.

Microsoft is offering Microsoft Security Essentials as an optional update for Windows XP, Windows Vista, and Windows 7 users who subscribe to Microsoft Updates. Microsoft Security Essentials is licensed for use on home computer and by small businesses with 10 or fewer computers.

Microsoft Security Essentials is free anti-malware software. We strongly recommend that you download and install it.

More Information

For more information about Microsoft Security Essentials, go to:

For information about support for Microsoft Security Essentials, go to:


Article ID: 2267621 - Last Review: 25-Jun-2012 - Revision: 1