From: "Rich Gauszka" 

My computer just rebooted after receiving the KB900485 update from MS

I noticed that it was published on 4/25/2006. Anyone know why this patch
requiring a reboot was done outside the 2nd Tuesday window?

http://www.microsoft.com/downloads/details.aspx?familyid=404280BF-B240-4A34-AE0
E-798CDED8CBAF&displaylang=en

Update for Windows XP (KB900485)
Brief Description
Install this update to prevent an issue in which you may receive a
"stop 0x7e in aec.sys" error message on a computer that is
running Windows XP Service Pack 2.

Overview
Install this update to prevent an issue in which you may receive a
"stop 0x7e in aec.sys" error message on a computer that is
running Windows XP Service Pack 2. The error may occur during startup, or
after the system has started. AEC.SYS is the acoustic echo canceling
driver. After you install this update, you may have to restart your
computer.




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