Note before I start:
I am a COMPLETE newbie and a Windows convert who knows pretty much nothing about Linux. I had Ubuntu 11.10 installed and working fine, but it crashed too often for my liking and I wasn't a fan of Unity, so I installed Mint 12. I hate to make things inconvenient, but I'll probably need more specific instructions.
I actually probably have several issues, but I'll try to start at the beginning.
So, I have a NVIDIA GeForce 6150 nForce 430 graphics card. I was trying to change the screen resolution and the only options were 800x600 and 1024x768. My monitor is 1920x1080, normally. When I went to System Info, I noticed that under "Graphics", there was the text "Experience Fallback". As such, I assumed that I needed to download a new driver. I downloaded the appropriate .run file from NVIDIA's website. I looked up how to execute it, changed the permissions of the file to executable, and tried to run it using sudo. The installer told me that I was running an X server and failed.
I then learned that pressing Ctrl-Alt-F1 would drop me out of X (sorry for the rough understanding on my part) and open a terminal. I tried this and got a black screen with no text. The terminal that I open from Accessories works fine, and Ctrl-Alt-F7 does take me back to the desktop. I just can't type anything or make things work.
I guess my question is: What do I do? I'm utterly confused. (Also, thanks for reading this far. It's much appreciated.)
EDIT: So I remembered that I still had the installation media, and I wiped and installed clean. The resolution is now fine. Marking as solved.