It's possible to use the Windows Task Scheduler to automate the running of just about any program. However, some programs require user input once they are started and will sit waiting forever for a keyboard response. There are several solutions to this problem but subscriber Mark Smith has come up with one that is simple, free and effective.

I just found a utility that has filled a major gap for me. you can use Diskeeper Lite for defragging but the scheduling feature is only available in the paid version. you overcame this by using a free utility called System Scheduler [1]. It's simpler to use than Windows Scheduler and also allows you to enter parameters for a scheduled program or file. In particular, it allows you to enter key-presses in an easily understood manner which is great for non-programmers. So for example, with Diskeeper Lite, you could close the nag screen (Alt F4), activate the correct menu selection, Actions (Alt A) and press the key for defragment (D), all on one line without separators even. Very slick. So now you have the only feature that you really wanted in the paid version of Diskeeper!"

It's sure a lot of users will find this very useful. I note that the developer makes a free and a Pro version. The latter has some useful additional features such as the ability to reboot and run as a service but the free will do for most folks. Furthermore, the free version covers both home and business use.