I tried to install Ubuntu 16.04 (through a LIVE-CD), and the installation process went fine. So when I tried to start Ubuntu for the first time, there already was a strange graphical glitch on the top of the screen (there were some green-purple stripes). It also loaded kinda slowly and the login screen also took a few seconds to load correctly (it also was kinda buggy). But, since this was the first boot up of the system I didn't think much about it.
So, signing in also went fine, but for some reason the desktop didn't load. I just saw the wallpaper and I can move my mouse fine, but I can't interact with anything. There was no task bar, no top bar, no nothing. When I right clicked on the desktop a context menu started flimmering up, but since it just was appearing and disappearing within a few milliseconds I couldn't interact with it. I thought I should try to update the driver, so I pressed STRG + ALT + F1 to force-open the terminal (there was no other way I could open it). And for some reason the Internet doesn't work either, so I couldn't update any driver or software.
If it does matter: I have a GTX 960.
I really hope anyone can help me, I really want to try Ubuntu to get rid of Windows, but it's really frustrating when nothing seems to work. I already reinstalled Ubuntu like 3-times, but that didn't improve my situation.