I've edited your message, because I don't think it's appropriate to post on a public forum an email exchange. I've got your email though.
However, reading McAfee reply, really makes me wonder if the guy that wrote it REALLY knows *anything* about security, which is quite shocking, considering it supposed to be their main business.
Stating "even Microsoft has determined this file to be infected", and posting results from virustotal.com (which we routinely use, btw), as if they were proving anything, seems a way to say "we don't know what this threat does but, if others say it's a virus, it might be true". Really comforting explanation.
Posting results of other virus scanners is entirely useless because the whole POINT of letting the user choose which files exclude from scanning, is because false positive DO happen! There's no such thing as a perfect scanning engine, that will be able to protect you from every threat and will not interfere with legit programs at the same time, that's why almost every other A/V product out there HAS that option.
Even McAfee itself has it, but only in the Enterprise version of their products, which is quite logical: try to sell that BS to someone that has maybe thousands of users cut out from work, because their engine suddendly decides to flag a legit program as a virus. This fact alone, should be ample proof that McAfee itself aknowledges the importance of this option: they just decided it's not something that users of the cheaper versions are entitled to have.
This should give anyone still using McAfee more than enough reasons to switch to another product.