well my guess would be you do not have enough disk space, especially if windows is still on it. Ubuntu requires 5gb of disk space to be installed. if you want to make it a "totally linux machine" why not format the drive? if you dont want to format it, try resizing your partitions. if that doesn't work you may have a faulty hard drive, have you run check harddisk?
fyi: im running debian 6.0.7 on an compaq n600c, Ubuntu 12.10 was the first distro i tried to install and i had similar issues. it would install then restart and nothing was there. debian and backtrack work great side by side, 30gb hdd 1gb ram 1.2 ghz processor. if all else fails, try debian.
Last edited by linuxgeek82; 03-16-2013 at 04:25 PM.