Installing Ubuntu (graphic errors)

I am new to Ubuntu. I first downloaded the Ubuntu ISO file and put it in Rufus. Then booted from it in BIOS (MSI Gaming 970) and everything was fine. I've downloaded Ubuntu before, and this time it looked different. there was no Ubuntu logo nor a maroon colored background. I hit "Install Ubuntu" anyways, and came across this:

I let it sit there while I went to school, and came back and it was still there. I realized I should have installed the Nvidia Linux drivers. And so I downloaded them, and don't know actually how to run it (it's a .run file on Windows)

So how am I supposed to install Nvidia graphic drivers for Ubuntu when Ubuntu won't even install?

It looks like a conundrum, doesn't it? But there's a way out: Booting with nomodeset.

First assure you're booting in UEFI mode.

Press e to edit the Try Ubuntu... entry and type nomodeset after or instead of quiet splash. Obs.: The MSI Gaming 970 motherboard, depending on the revision, may need an additional parameter: iommu=soft.

Press F10 to boot the live session. nomodeset will force a compatible low graphics (low resolution) mode.

Install Ubuntu: How do I install Ubuntu?

In the first boot you'll need to repeat the process and add nomodeset or both. Then open dash and search for Additional Drivers. Select and apply the recommended Nvidia drivers version. Reboot.

The nomodeset parameter in no longer needed. The other parameter, iommu=soft, if required, will need to be made permanent. In terminal:

sudo -H gedit /etc/default/grub 

Change the line starting with GRUB_CMDLINE_LINUX to GRUB_CMDLINE_LINUX="iommu=soft"

Save, exit, reboot. Enjoy Ubuntu!