Review this MSKB Article and the solution:
Windows Update Site Lists Updates That You Already Installed.
athlon /XP automatically installs security bulletin MS03-051/XP KB810217/ buffer overrun front page server.Says it installed successfully but shows up in windows scan as not installed. Tried manual install [Fp4Awel.dll ]but still shows up as not installed the next day. Could set up swithing be improper for that particular update?All other updates installed fine. NEW PC USER

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic