Why does my machine shut down slowly after I enable "Clear Virtual Memory Pagefile When System Shuts Down"?

A. In a previous FAQ, I explained how to configure the system to clear the pagefile at shutdown for security purposes. When you enable the setting to clear the pagefile, your machine will take longer to shut down (depending on the size of the pagefile and on the disk subsystem performance) because the shutdown process must physically write to each page in the pagefile to clear the page.