Ta partition UBUNTU n'est plus présente.
Aurais-tu déclenché une mise à jour de windows7 en windows10 sans le savoir?
ubuntu@ubuntu:~$ sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo qp Simple tool to repair frequent boot problems.
Website: [url]https://sourceforge.net/p/boot-repair/home[/url]
More info: [url]https://launchpad.net/~yannubuntu/+archive/ubuntu/boot-repair[/url]
Press [ENTER] to continue or ctrl-c to cancel adding it
sudo qpt-get update
gpg: keyring `/tmp/tmpbpnkzdby/secring.gpg' created
gpg: keyring `/tmp/tmpbpnkzdby/pubring.gpg' created
gpg: requesting key 60D8DA0B from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpbpnkzdby/trustdb.gpg: trustdb created
gpg: key 60D8DA0B: public key "Launchpad PPA for YannUbuntu" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK
ubuntu@ubuntu:~$ sudo apt-get install -y boot-repair boot-info
Lecture des listes de paquets... Fait
Construction de l'arbre des dépendances
Lecture des informations d'état... Fait
E: Impossible de trouver le paquet boot-repair
E: Impossible de trouver le paquet boot-info
ubuntu@ubuntu:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"
ubuntu@ubuntu:~$ sudo blkid
/dev/loop0: TYPE="squashfs"
/dev/sda1: LABEL="PQSERVICE" UUID="8EBA6836BA681CC9" TYPE="ntfs"
/dev/sda2: LABEL="SYSTEM RESERVED" UUID="103E69403E692048" TYPE="ntfs"
/dev/sda3: LABEL="Acer Windows" UUID="78F63561F6352134" TYPE="ntfs"
/dev/sda5: UUID="de232508-29c9-45a3-92d8-578a1d99b271" TYPE="swap"
/dev/sda6: LABEL="data" UUID="6663907027B4A6C9" TYPE="ntfs"
/dev/sr0: LABEL="Ubuntu 14.04.3 LTS amd64" TYPE="iso9660"
ubuntu@ubuntu:~$