Enarsan's question : "Please I need help to uninstall several versions that got on my computer and certainly now I take lots of disk space and now prevent me from using Windows.I am very grateful in advance who can help me. I do not care that the answer is in English. Greetings Enarsan" I don't speak your language Enarsan but I think Google help me ;) You tell us you want to uninstall "several version", but version of what? Ubuntu? Windows? Please be more precise on your problem, and reply in english, please. If your problem is that you install to many linux on your computer and your hard disk is full, the best way for a beginner would be to copy all important data (documents, pictures, musics, movies...) on an external hard disk. After that, insert an Ubuntu CD and install Ubuntu on the full disk. It will erase everything on your computer, and you will have a new free/beautiful Ubuntu. After that, plug your external hard disk and copy important data in your /home partition. If you can.., during ubuntu installation, choose to create a separate /home partition. When you want to upgrade Ubuntu or change it for Xubuntu for example, you will just have to keep the /home partition (don't format) during installation. You will safe some installation time. But keep in mind that it is important to back up (=make a copy) of all important data (documents, pictures, musics, movies...) on an external hard disk. Have a good day.