One solution that works: Before loading SupportAssist, "Quit" Malwarebytes.  Wait for 5 minutes, then run SupportAssist.  Re-start Malwarebytes. (patience.  The key is the 5 +/- min wait.)  
So, this issue first started out as I was playing a game, and when I tried to alt-tab, I got the error "video scheduler internal error" I did a few things to try to fix it, but when I ran support assist, the hardware scan option wouldn't run. It kept failing and now won't load to 100%. Not sure what to do, but it was the first time in a while (after a major client update) I have played the game and not exactly sure what was the cause. Any help would be great.
Support Assist Scan Hardware Not Working