Can't disconnect projector, screen is garbled

#1
Running Windows 7 Ultimate. I wanted to connect my laptop to an external monitor so I pressed "Windows key + X", then clicked "connect display", then "extend."

On most computers, doing this will allow you to output the display to another monitor.

When I did it on my laptop, the screen started flickering and became garbled. It's too garbled to see, and I can't find the mouse and undo what I've done. I tried restarting but it's still like this.

Please help! Thank you.
 


#2
Problem solved: I booted into safe mode and used system restore to restore to a point before the problem. Thanks!
 


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