timmmay: I installed Ubuntu 15.04, it took about 5 minutes of my time, and I have all the data copied over. It seems to be running ok. Youtube on firefox is only playing 360p, but for general use it's fine. It's not snappy exactly, but it's fine.
Is it worth trying Lubuntu/Xubuntu now I've done that? Is there a way to change without killing the home partition?
I maybe reading this wrong, but, 5 minutes to install Ubuntu ????