Add or Remove Programs entry for
Security Update for Windows XP (KB890046). This update should not be uninstalled.
Vulnerability Details:
"This is a spoofing vulnerability that exists in the affected products and that could enable an attacker to spoof trusted Internet content. Users could believe that they are accessing trusted Internet content. However, they are accessing malicious Internet content such as a malicious Web site. An attacker would first have to persuade a user to visit the attacker’s site to attempt to exploit this vulnerability." 