Don't know why you just didn't uncheck "Enable Transparency" when you right click on the desktop and go to personalize...that is disabling aero. If you have a system restore before you did that might be your only chance. I don't feel like googling how to solve it.
Edit : If you don't have a restore point, you may be stuck with re installing windows or doing a repair, to see if that helps. Lesson learned I guess?