I downloaded update for Maya is Maya 2012 SP1 (http://usa .autodesk. com/adsk/servlet/ps/dl/item?siteID=123112&id=17847744&linkID= 9242259).In the process of downloading and finished Maya 2012 SP1, NIS didn't alert or block it. But, when i double click for setup, Norton analysed and removed it.
NIS alert Maya 2012 SP1 is WS.Malware.2
Ps: Windows 7 x64 and Maya 2012 SP1 x64
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