Yes, that option was checked for the Full Scan somewhere in the past - but since all your disks will be scanned during that scan, it doesn't really matter whether it's checked or not (I "unchecked" it because in cases of weird links pointing to strange drive letters, as we sometimes see with some Windows installations, non-matching drives, e.g. removable disks if they happen to be connected to those letters at the moment, might get scanned).