[ubuntu] In trouble trying to install the grub with Boot-Repair

Hi!!!

I'm in trouble with a Lenovo IdeaPad S10-3 from my sister, I don't know why the ubuntu installer is unable to install the grub ('Executing grub-install failed. This is a fatal error.')...

I did use the Boot-Repair with the "Recommended Repair" and finally it said there was an error :( The URL was http://paste.ubuntu.com/5615125/

Thank you very much in advance for your help!!!

F