MyDoom/Zindos removal tool offered erroneously via AutomaticUpdates?

On one of my home PCs - which is behind the correctly-configured
firewall in my dsl modem, and also uses the Windows XP firewall, - and
which always gets updated with AutomaticUpdates, has (and always has
had) up-to-date virus protection, I was offered the MyDoom and Zindos
Removal tool in WindowsUpdate as a Critical Update.

http://support.microsoft.com/?kbid=836528

I clicked on the more information link and was told that if I'm being
offered this, it is because I'm likely infected with the worm.

Anyway, (surprise surprise), running the tool didn't find any infection.
Neither did a full scan with Norton Antivirus using current definitions.

Has anyone else been offered this download? I'd love to know what
criteria they used to determine I was infected.

I note that Zindos.A is used to create a date-triggered DoS attack
against Microsoft.com.. perhaps they are being over-cautious..

Glenn

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