Norton Antivirus has never flagged this as having a virus for me, and I've downloaded it more than once (after content updates). I literally just downloaded the new update and although my system asked if I was sure about running it, because it's so new (which mind you, can happen with well known things--my TS2 always had this issue back in the day and I would need to override things), there's been nothing else. Are you sure it flagged it as actual malware?