An unchecked buffer in Windows help could allow an attacker to could gain control over user's system. Maximum Severity Rating: Critical Recommendation: Customers should install the patch immediately. Affected Software: Microsoft Windows 98 Microsoft Windows 98 Second Edition Microsoft Windows Millennium Edition Microsoft Windows NT 4.0 Microsoft Windows NT 4.0, Terminal Server Edition Microsoft Windows 2000 Microsoft Windows XP See http://www.microsoft.com/technet/security/bulletin/ms02-055.mspx