So, I have a Lenovo x230 tablet that came installed with windows 7 pro. I upgraded to windows 8 Enterprise (thats what they have at school.) Just the other day, I shut down while in tablet mode. When I opened it back in regular mode the computer screen was upside down. Everytime since, I have to manually flip it upon start. Also, now my screen wont rotate into tablet mode. I have to manually flip the screen. Help.