I have a thinkpad edge 14 core i3 2.4 ghz and 4g ram;

I have tried kubuntu 10.04, 10.10, 11.10, 12.04 and 12.10 (all x64 architecture);

Both oracle and ose virtualbox only works properly to install XP and windows 7 quest system on kubuntu 10.04;

For every other kubuntu release since, the guest installation goes as far as formatting the virtual drive, freezes at this step, and doesn't even go as far as copying files to hard-drive to begin installation. But virtualbox has not stopped responding to commands; I can kill that one specific window with the problem installation ("machine" -> "close" -> "power off the machine") and start over again without having to force-kill virtualbox application.

If anyone knows how I can go about addressing this problem, any help you can provide would be very much appreciated. Thank You.