There is definitely no virus in the Super Pack. And no virus could cause that problem, if you have it.
Question 1: What virus did your antiivirus say it was?
Question 2: And what version of which antivirus package do you have?
[update]
Just to be absolutely certain, I downloaded the XMAS pack set-up program from VSTEP. It is the same as when I supplied it to them. No changes (if had been infected, it would have to be changed, wouldn't it?). Also, it has been downloaded by thousands of people, I believe. And only you seem to be infected.
I also scanned the download (image below). No problems with it.
So you must be infected yourself. Something on already your system has infected the file. That's the way they work. Or perhaps you've made a mistake?