I just managed to install ubuntu vers 14.04.1 alongside windows 7, all works ok but it is so SLOW I tried a different video driver, with some improvement, but not much, I would like to re-install a lighter version like the latest lubuntu as I think it is just a lack of resources issue, the PC is a small shuttle (IDEQ) with an AMD sempron only 1GB of memory so I think I am asking a bit much of it. How do I remove or replace the existing Ubuntu 14.04.1 with the lighter Lubuntu 14.04? without messing up the win 7 setup? I have the lubuntu image on a USB stick with the loader but have not found a way to get it to overwrite the existing installation. Thanks..