Hi and welcome to LQ!
Your Ubuntu disks are too old, which their supported is terminated in 2010! Now the new Ubuntu version is 14.04. And about backtrack, same issue. It is replaced by kali linux.
Anyway you should look at distrowatch
and choose your distro. I don't know about CPU and RAM of your laptop but probably you need to use a distro with a lightweight desktop, like xfce.