In late June, Symantec updated the Norton 360 software to the version 22.5.0.124. This new version created an issue with false heuristic detections. The Norton support created the patch 22.5.2.15 to resolve this issue which was released in July 21. Please update the Norton software to 22.5.2.15 or above to resolve the problem. Then, run another scan to verify problem is solved.
Here is the Norton Community
http://community.norton.com/en/forums/norton-360-2250124-found-135-heuristic-viruses
National Instruments
Applications Engineer