I was given an old HP Windows7 desktop.
It has NVIDIA GeForce 6150 SE graphics.
I deleted the windows partition and had installed ubuntu, then upgraded to 14.04 LTS.
In the current state, whenever I boot up and log in, the system crashes and the picture completely scrambles.
This happens at random; sometimes in the first two minutes, sometimes after a couple of hours. I would like to upgrade to the newest or best possible version without having this issue.