I was installing a new program when I got the notice from Norton that the operation was being cancelled because the program contained the SONAR.Heuristic.130 virus/trojan. The people I'm purchasing the program from say it's because their program is not widely used and is not in Norton's database and therefore is suspect. They suggest that I disable Norton while I install it - something I'm not really thrilled about doing. Any thoughts? Is their claim that the notice is due to the program being unknown valid?