Hello folks, I am a newbie with a bootup problem. I have installed Ubuntu 9.04 within Windows XP. When choosing Ubuntu from the bootup menu I often get a message saying BUG:INT:CR2 bfffff... and the screen freezes up. I have to switch off my computer to unfreeze the screen. On other ocassions I can bootup Ubuntu with no problems. Would welcome any advice on ovecoming this problem.