1. It might be worth trying to use live-usb and check if your files are still there.
2. If you have another computer to play with, why don't you install the very same Ubuntu 15 (15.04 or 15.10) you already had and see if restoring works with that?
1. It might be worth trying to use live-usb and check if your files are still there.
2. If you have another computer to play with, why don't you install the very same Ubuntu 15 (15.04 or 15.10) you already had and see if restoring works with that?