another approach is:
1. In MSE configure a scan to take place with any settings you want
2. Run Task Scheduler (WIN | task sch | enter)
3. double-click on the entry for the MSE (forget what it's called)
4. Trigger tab, edit and select your desired time.
That saves the effort of configuring the other settings, although I went the long way first and followed the tutorial from Austin (author of write-up in link I gave).