After boot you are getting console with initramfs
command.
It means, your system uses wrong system drive for boot.
How to solve? Do the following:
1. Find the partition you installed OS on
initramfs> blkid
2. Mount partition with your OS:
initramfs> mkdir /mnt
initramfs> mount /dev/sda1 /mnt
initramfs> mount --bind /sys /mnt/sys
initramfs> mount --bind /dev /mnt/dev
initramfs> mount --bind /proc /mnt/proc
initramfs> chroot /mnt
3. Update Grub
initramfs> update-grub
initramfs> grub-install /dev/sda
4. Reboot and cross your fingers
initramfs> reboot