Add or Remove Programs entry for Sicherheitsupdate für Windows XP (KB928843). This critical security update for Windows XP addresses a vulnerability in the HTML Help ActiveX Control that could allow remote code execution.

A remote code execution vulnerability exists in the HTML Help ActiveX control. An attacker could exploit the vulnerability by constructing a specially crafted Web page that could potentially allow remote code execution if a user visited that page. An attacker who successfully exploited this vulnerability could take complete control of an affected system.