Desktop no longer working after installing nvidia driver

Hi there!

Today I've tried installing a graphics driver for my Linux partition on my laptop.
However none of the tutorials worked and now it just freezes instead of showing a login. :(
(I did undo everything after I realized it doesn't work, before attempting the next tutorial)

I can't reinstall Linux because I'd loose some of my important data and I don't have time for a backup either.

My Linux Distro is Kali Linux 3.x (I think, I didn't memorize it and now I can't access it :mad:)

I've tried using the recovery mode, but because of some bug, which keeps spamming device dumps on my screen it's almost unusable. :(

Thanks in advance for your help! :D

Edit: Nevermind it works now! :D