Installing Ubuntu 16.04 on MSI GE72MVR, system freezes when I restart

Solution 1:

The problem is most likely with graphic card driver. In grub entery, press E and in the new page add nomodeset before quiet splash. This disable default driver. Press F10 to return to login page. Follow the instruction in : How can I uninstall a nvidia driver completely ? to remove old driver. Then reboot and login in using nomodeset again. Then you should install new driver. Don't download driver from Nvidia website. It's likely to be incompatible. You should download it from ppa repository:

sudo add-apt-repositorty ppa:graphics-drivers/ppa

sudo app-get update

sudo app-get install nvidia-381

Then restart computer and you'll be able to login normally.

Solution 2:

I got this kind of problem multiple times when trying to install linux distributions.

If you used the same ISO file (i.e. you copied it on a USB stick and flashed it without re-downloading) then your file may contain errors.
Try downloading it again from a torrent ; there should also be an option in installer to check installation files, but I think re-downloading is the safest option before trying anything else.

You can verify your downloads by performing mdsum <filename>, sha1sum <filename> and sha256sum <filename, comparing the values of the checksums to the corresponding values found at http://cdimage.ubuntu.com/ for the version of Ubuntu you are downloading.