Windows Update

Using Vista Home Prem 32Bit...

I have Windows Update set to "Download Updates but let me choose whether to

install them"

Today, 8/22/08...I see in Windows Update History that the following

"Important" Update was sucessfully installed on my PC:

"Windows Update Agent 7.2.6001.784"

I certianly did not initiate the Install. So why would this Update be

Installed without any action on my Part? I thought the purpose of setting

update as I have was always to prompt me that new Updates were available and

let me select if I want to install them.