virtualbox.org

I installed VirtualBox on a Windows 7 with Intel core2 duo processor with 6GB of ram . I created a virtual machine with Ubuntu 14.04. I reserved for the operating system 2 GB . The performance is poor. The operating system is very slow especially in the GUI. I also enabled 3D acceleration. What to do? many thanks

Install the guest additions ( in the guest )

Thank. I try.