I need to install virtaulbox 4.3.10 on the clients here. The security
on the clients is pretty tight. When I run the installation (quiet)
everything seems to work, besides that a Messages box pops up telling
me that the USB Driver is not digitaly signed. The users have to click
ok or abort to finish the installation.

Do somebody had this issue with virtualbox before?

I already import all the needed certificates and install them already
as full trusted to the machine, still ths seems not to be enough.

Advance Thanks