When you try to install SAM on your computer with Norton Antivirus running, Norton may identify the file as a threat with the name "WS.Reputation.1."

This message does not indicate that Norton detected a threat. It does indicate that SAM is software that has a "low reputation score" based on the Norton's crowd-sourcing method for identifying potential threats. This approach tends to identify brand new versions of software and software with smaller user bases as a threat.  

You can install SAM by restoring it from Quarantine as described here:

    Norton Community discussion of WS Reputation 1
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Best regards,
Paul.