Reset Photoshop preferences to default

How to reset Photoshop preferences (In Windows):

1. Hold down all three Ctrl+Alt+Shift buttons and open Photoshop from the start menu.
2. As Photoshop loads, you should get a prompt asking if you would like to "delete the Photoshop settings file", Click yes
3. All done. Everything will be set like it was right out of the box. It even resets your "Recently opened" menu.

I had to do this when I ran into trouble starting Photoshop in Windows 7. When I would open the program it would immediately close and give an error about not having permission to change a file. The only way to start it was to "Run as administrator" but this fixed it like a charm.