Some versions of Norton label files as threats if they are new. It considers anything it hasn't seen several times as a potential virus. The emulator exes were updated recently so the number of people that have used Norton and the new files in the past couple weeks is low which is causing the problem.
I am busy with real life for the next week or two. If you are still having problems when I get some more free time, we can try to connect through chat and get it taken care of.
Norton isn't a very good anti-virus.
2009-08, 10 August-05 September | :: Virus.gr ::
^Norton is ranked #28. Below several free programs.