A friend of mine installed Ubuntu on my Samsung N210 netbook and it worked very well. It was much faster than the Windows 7 (which is still installed but partitioned).
Ubuntu suggested I upgrade and I did but now it proves this version might be far too much for such a small computer and it is incredibly slow to do anything. How can reinstall the older version? I think the safest way may be to uninstall Ubuntu and then reinstall via the windows 7 which still exists but I don't know how to do that... Any suggestions or comments would be really appreciated.