All of the custom scans that I referred to in my original post were initiated from the right click context menu in either File (Windows) Explorer or Multi Commander. The possible motive for your question made me initiate a scan from the Scan tab within Malwarebytes to see if it made a difference. It didn't. The files I tested on were rkill.exe, tdsskiller.exe , and AdwCleaner.exe as d/l'ed from a popular website and stored for each test in a folder by themselves. The right click method was performed on the folder itself to duplicate conditions with the Scan tab method (i.e. a single file in a folder). Also Scan Memory Objects and Scan Startup and Registry Settings were disabled for the same reason.