Add or Remove Programs entry for Security Update for Windows XP (KB908531). This critical security update for Windows XP addresses a vulnerability in Windows Explorer that could allow remote code execution.

A remote code execution vulnerability exists in Windows Explorer because of the way that it handles COM objects. An attacker would need to convince a user to visit a Web site that could force a connection to a remote file server. This remote file server could then cause Windows Explorer to fail in a way that could allow code execution. An attacker who successfully exploited this vulnerability could take complete control of an affected system.