Always
Removes all the threats that SONAR detects.
High-Certainty Only
Removes all the high-certainty threats that SONAR detects.
When its set to the default setting of high-certainty only. What does it do when it deems what ever it finds as a low risk? Does it just sit there? Or does it ask you what you want to do? Is it not best to put it on "Always"?