I have a 10 year old laptop among one of my computers that runs ubuntu, and besides the obvious ram capabilities, it runs fine for what that computer is used for. As for your laptop specs, I would say it should work just fine. With ubuntu there are updates with the number and sometimes LTS is after it, meaning it is a long term update with more consistences between the previous/next LTS update. I would recommend either 14.04 LTS ubuntu or 14.10 ubuntu. The difference between the two isn't really noticeable from the way it looks, it is mostly all security updates and a few tweaks in the coding. A good thing about downloading it to a disk is that when you go to install you will have the chance to preview it, without changing your operating system over fully just yet. However i will say that during the preview, it has been slow in my experience compared to a full install, simply because it is reading it off the disk, and not the hard drive. Good luck!