Teste isso:
Crie um DVD / pendrive do Ubuntu inicializável.
Inicialize a partir dele e selecione Try Ubuntu without installing
.
Quando chegar ao desktop do Ubuntu, abra um terminal.
Pressione Ctrl + Alt + T
Execute:
sudo -i
fdisk -l
O Fdisk irá dizer-lhe qual é o seu /, suponha que seja / dev / sda1, continue a executar:
umount /dev/sda1
fsck -y /dev/sda1
mount /dev/sda1 /mnt
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt
dpkg --configure -a
apt-get -f install
apt-get -m install
apt-get update
apt-get dist-upgrade
apt-get install --reinstall ubuntu-desktop deborphan
grub-install /dev/sda
grub-install --recheck /dev/sda
update-grub
deborphan
apt-get --purge remove $(deborphan)
deborphan --libdevel
apt-get --purge remove $(deborphan --libdevel)
deborphan --find-config
dpkg --purge $(deborphan --find-config)
apt-get autoremove
apt-get clean
exit
umount /mnt/sys
umount /mnt/proc
umount /mnt/dev/pts
umount /mnt/dev
umount /mnt
reboot