First time I'm using Linux, so pardon me if this turns out to be too obvious. I also rarely post on any kinds of forums but I've tried googling the hell out of my problem to no avail.
Alright, now about the issue I'm having.
At first, after I installed ubuntu (12.10) for the very first time, I had all kinds of weird graphics artifacts and glitches. Sometimes I couldn't login, it would just loop me back to the login screen all the time. If I somehow managed to log in (Don't ask, I can't replice the log in thing now, no idea how I got it), what I got was a completely corrupted screen. It's like the desktop started loading - I could see the whole sidebar thing, but clicking anything did nothing at all, and then it just went corrupt. The top side was all covered in black squares through which, I think, I could read the words login and password. Well, anyways, using the nomodeset option in GRUB seemed to help, it was slow, but I managed to get in and successfully (or so I thought) download the proprietary drivers.
After doing that, I got a new type of issue. On boot the screen flashed purple and then went black with the command-cursor thing blinking on the left side constantly. This is what has so far happened with any Nvidia drivers that I've tried using. The nouveau drivers on the other hand give me the corrupted screen thing and only work with nomodeset (or classic mode in 12.04, which I also tried installing). The nomodeset mode doesn't work when I'm using the Nvidia drivers.
I'm not at the computer that is experiencing the problem right now, so I don't really remember the specs in details, but I just had to post this before I go to bed or I'll go insane, so here are the specs:
Videocard - 8800gtx
Processor - Core2Duo, don't really remember the exact model
4 gigs of ddr2 ram
I'd greatly appreciate any ideas. I'll try everything out, even though I've tried many of the suggestions that I've found through google, most of the time I had only a very approximate idea of what I was actually doing, so I'll try out any possible solution.