Last month, Microsoft announced that Microsoft Security Essentials (MSE) will be free to use for organizations with up to ten (10) PCs, with the change being effect early in October. As announced in the Windows Security Blog, the change is effective today, October 7, 2010.
Most small businesses with up to ten PCs do not have dedicated IT support. For those businesses, managing a number of computers can be daunting. For assistance in setting up a group policy for MSE, I recommend this article by Microsoft MVP Alan Burchill, "Group Policy for Microsoft Security Essentials". Alan's article includes illustrated instructions as well as a link to an XML Group Policy Preferences Registry file for the Group Policy settings.
MSE works on Windows XP (Service Pack 2 or Service Pack 3); Windows Vista (Gold, Service Pack 1, or Service Pack 2) and Windows 7. For additional information visit the Microsoft Security Essentials website.