Jim,
I have this same download from the same site and McAfree (our corporate standard) does not flag anything as having a virus on my system either. I've tried the IQ 16 GA client and the SP01 client with the same result.
Of note, though, is the platform. Our docs say that we support the same platforms as the server. Vista is not one of those platforms listed. Windows XP, Windows 2008 and Windows 7 are the only ones listed.
I've installed this on my Windows 7 32-bit system and don't get popups via McAfee. Could be that Norton sees something that's not there or that the platform is causing the issue.
Mark