[ubuntu] Cant use ubuntu , it goes directly to windows :c

I need your help guys . I have an Acer laptop that already have windows 10 preinstalled . I wanted to use ubuntu and installed it with its partitions, but when i reboot i cant see the screens that allows me which operation system i want to start.

I have use boot -repair and this is the result :

http://paste2.org/cbzOCJft

Hope you guys can help me with this , because i really want to have ubuntu .

Thank you so much