Oh thank you Sumit! I think I understand: Since the ESET program you describe runs from a USB drive, then it would not conflict with my SuperAntispyware.
And yes, I am not running SuperANtispyware all the time, I just do occasional quick and full scans. So it sounds like I am OK there.
I read the ESET SysRescue page and some reviews. I think I will do that tomorrow. But one of the reviews said ESET SysRescue might be a little high level and novices (like me) might not do all the settings right. So if yo have any tips about the settings, I'd be grateful. Thanks again!