Microsoft released its April 2011 security update a few minutes ago, all of which can be found here. The biggest fix of the bunch appears to be MS11-018, a bulletin for Windows Internet Explorer that addresses two security holes already used by attackers to hijack machines. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. The update addresses the vulnerabilities by modifying the way that Internet Explorer handles objects in memory, content during certain processes.”]
Source: https://www.csoonline.com/article/2134674/microsoft-april-2011-security-update-is-live.html