Microsoft has just released a new version of its free antivirus, Microsoft Security Essentials 4.2.223.1 for Windows 7, Windows Vista and Windows XP.
It's a major release but there's a problem — If you are an existing MSE user, you will see an update KB2804527 (http://support.microsoft.com/kb/2804527) in Windows Update. It is listed as "Update for Microsoft Security Essentials – KB2804527 (http://support.microsoft.com/kb/2804527) (4.2.223.1)". Make sure to create a restore point before installing this update as a lot of people are getting an error (Error Code 8004FF80). MSE stops working if the update fails to install. So take care.
(http://i48.tinypic.com/34xro5v.jpg)
Download (http://www.microsoft.com/en-us/download/details.aspx?id=5201)