SA, scheduled scans

Hi All

Just received my new laptop and i have a question with regards scheduling scans in SA (SupportAssist).

Is there anyway you can schedule the scans to run on shutdown rather than at a specific time? I can only see the options being at a specific time I.E. 7:00 PM either weekly or monthly.. 

As i switch my laptop off when not in use i guess if a timeslot is missed the scan will occur when i start my laptop, which i don't want as it could interfere with the start up of applications, processing images (i do photography and astrophotography) hence why i wonder if it can be done at shutdown.

Kind regards