Running win7 pro on a HP 8200 Elite.
Sometimes I need to shut down the machine (in a controlled way) as quickly as possible. This may happen if there is a power outage and the machine runs on the UPS. In Win XP I could just click Start and shut down and select to not install any pending updates. In Win7 I don't get this option, and Windows starts to install the updates that are pending with a message "Installing update x of y. Dont shut down the computer". This could take several minutes - often longer than the power from the UPS lasts.
Question: How may I shut down Win7 quickly without installing any pending updates?