Scheduling NSW 12 and Optimize Disk

How does one go about scheduling an Optimize Disk in NSW 12 (2009)?

 

On first attempt, it brings up the UAC, and then had proceed manually.

 

I don't want to manually defrag every time!  I want to do it in the wee hours of the morning when I'm asleep.

 

Using WinVista Home Premium 64-bit.