When I click the Computer Scan icon, it immediately opens Custom Scan. In the window under Profile, items are listed with a checkbox to show what is being scanned.
If I connect a Flash Drive, it appears in the list under Macintosh HD, which always has a checkbox and is always scanned.
On a few occasions, "Boot OS X" appeared below Macintosh HD with its own arrow and checkbox. I did not connect anything to the computer when this happened; not even my flash drive.
Why did "Boot OS X" appear and what was ESET picking up? What does this reference? Please note that in the attached snap