When I open the package:
Same version is available in a software channel
You are recommended to install the software from the channel instead.
When I try to install the package:
(Reading database ... 157025 files and directories currently installed.)
Unpacking virtualbox (from .../virtualbox_1.5.6-28266_Ubuntu_gutsy_i386.deb) ...
dpkg: error processing /home/mark/Desktop/virtualbox_1.5.6-28266_Ubuntu_gutsy_i386.deb (--install)
trying to overwrite '/lib/modules/2.6.22-14-generic/misc/vboxdrv.ko', which is dpkg-deb: subprocess paste killed by signal (Broken pipe)