install network printer on Win 7 @ Vbox @ Ubuntu

[oxy]

>> Host: ubu 14.04 64 bit
>> Guest: Win 7 SP1 @ Vbox 4.3.28
>>
>> My network printer Dell C3760dn works perfectly from ubuntu, but i
>> cannot install it on windows. No firewall on ubuntu, printer access
>> controll free, Windows connects to the network over NAT at Vbox.
>
> I know this seems totally obvious, but have you installed and configured
> Samba on the Ubuntu host?  It should automatically share your printer on

just to clear one thing: the printer is not attached to the host
computer/system.
It is on the network.