Icons got bigger. Have to restart every single page for them to work

So basically i've had this computer for a year now and it's always worked fine until about 3weeks ago. For some reason the whole screen maximized on its own and i have to restart Facebook about a hundred times a minute to get it to work. It's also slowing down ALOT :s Someone please help me :c

Hello roromarblesx15, and welcome to Seven Forums.

Is this only in Internet Explorer?

If so, then you could press the F11 key while in Internet Explorer to toggle between full screen and normal mode.

Could you give more details on what it's doing?

Hope this helps,
Shawn