Hi,
I checked it once again with my colleague and we came to the conclusion that problem was as you suggested. The download is silently blocked by Norton Internet Security.
The only problem is that in such cases is that there is none error displayed, so creates the impression the installation was successfully, but in fact there is no VirtualBox. But it can be installed separately in 5 minutes...
Thanks for you interest in the problem.
Regards,
STeN
