Insight Protection option lets Norton Internet Security perform an Insight Network scan on your computer

When the Insight Protection option is turned on, Norton Internet Security performs a traditional scan and an Insight Network scan simultaneously. The traditional scan uses the definitions from the local system, and the Insight Network scan uses the definitions that are hosted in the Cloud. Norton Internet Security performs only a traditional scan if the Insight Protection option is turned off.

Norton Internet Security performs an Insight Network scan only when the Insight Protection option is turned on. By default, the Insight Protection option is turned on.

The Insight Network scan supports only Insight Network Quick Scan, Insight Network Single File Scan, and Insight Network Context-Menu Scan. Insight Network scan does not support a Quick Scan that runs as a part of a Full System Scan or an Idle Full System Scan. It also does not support Full System Scan, Email Scan, single file Office document scan, and Auto-Protect scan.