I opened Sage, it opened, but the icon dropped to the bottom menu bar, and when you clicked on the icon was blank - Sage top border, but main part just white.  Tried to right click to maximize, but that option wasn't available.  

I have had this happen, off and on, with various clients and computers, over the past few years.

What causes this, a blip in Sage, or a blip in the computer?