Missing Update

I receive weekly email from Microsoft on available and recommended Updates.
This week there were four security Updates and a KB890830 Windows Malicious
Software Removal Tool.

I downloaded and installed all five Updates, but whilst the other four are
being shown in the Add/Remove as installed the above is not. This happened
on both of my computers.
Both have OS Win.XPPro(SP2) and both run Microsoft Antispyware Beta 1,
AVGPro,ZoneAlarm Firewall and Ad-Aware SE Plus.

Will someone please advise me why this occurred

Doesn't actually install from WU, just runs, does what it has to do and then
disappears.
Quote "Microsoft will release an updated version of this tool on the second Tuesday
of each month. New versions will be made available through this Web page, Windows
Update, and the Microsoft Download Center"
http://support.microsoft.com/?kbid=890830
The Microsoft Windows Malicious Software Removal Tool helps remove specific,
prevalent malicious software from computers that are running Windows Server 2003,
Windows XP, or Windows 2000


"" <> wrote in message
news:%...
>I receive weekly email from Microsoft on available and recommended Updates. This
>week there were four security Updates and a KB890830 Windows Malicious Software
>Removal Tool.
>
> I downloaded and installed all five Updates, but whilst the other four are being
> shown in the Add/Remove as installed the above is not. This happened on both of my
> computers.
> Both have OS Win.XPPro(SP2) and both run Microsoft Antispyware Beta 1,
> AVGPro,ZoneAlarm Firewall and Ad-Aware SE Plus.
>
> Will someone please advise me why this occurred
>