What is causing my computer to do this?

I try to open a page on my computer, like my browser or even the control panel, and when I click on it all it does is post the page in the toolbar at the bottom and it looks like the full page just flies off the screen. Really strange. I don't know if it is a virus or if there is something wrong with my settings that is causing it to not be able to open the screen size page. I've never had anything like this happen.

I have Google and Firefox as my browser. I was using Firefox and when I opened it, the screen became huge and would not work. I can't get to my remove programs to erase it because the control panel will not open in full screen.

I'm stumped on this. Can anyone help me?