My Malwarebytes is the paid version. It is set to active (i.e. always-on) scan. I use Spyhunter4 to run a scan every evening (during which it always finds and eliminates 50 - 80 low-level adware/malware threats.) Spyhunter is not set to live-scan, as I suspect setting both programs to do this would present conflicts, not to mention overtaxing resources and being overkill. I have reversed this (i.e. set SH4 to live scan, MB to daily scan) but the way I've got it working now does not appear to create problems.