I'd like to uninstall Windows 7, I read that through Gnome I can open an OS uninstaller, but I can't find the way... Anyone?
Its not a program that is included in Ubuntu, you will need to add it but first you must add the repository that includes it. It is not in the standard sources, so you will not be able to find it in the Software Center either. While not an official Ubuntu program I have used it and it worked flawlessly.
To install it type the following in the terminal to add the PPA(personal package archive)
Then to get the package info on the PPA type
to install type
the -y in the above command will automatically answer yes to any questions, this is a dangerous thing to do in most cases but fot this program it is fine.
to start the program you can look in the menu but as the terminal is already open you can just type
You can also do the last 3 step at once by entering
you can then use the program to uninstall Windows.
For more in depth info please see the Ubuntu Help page that was also my Source
I have not personally tried this (as I dual boot), but you can download an uninstaller program. You can look here for information on how to install and use it (see the "second option"): https://help.ubuntu.com/community/OS-Uninstaller. An alternative is to use a tool like GParted to format and delete the unwanted windows partition. Be sure to back up your files!