I just upgraded, and my system tray disappeared. I have no controls. What do I do?

I have no controls, I can't access files or controls, I can't even minimize a window, or shut the computer down. There is no tool bar, no nothing. How do I get it back, or at least delete the upgrade and go back to the last version? This is my main computer, and I am desperate. Please help.

Select gnome classic from the login screen, does it help

I didn't see any options. I was able to log on in safe mode. I don't think this version of Ubuntu works very well. Still a lot of kinks. Do you know how I can go back to 10.10 without doing a complete reinstall?

When you come to log in. Click your name then at the bottom of the screen select gnome classic.

I don't have a log in screen, I never have.

Thank you, I will try that.

That worked, thank you.

Thanks actionparsnip, that solved my question.

ok you can now remove then reinstall video drivers (if you used proprietary)