When i start Professor teaches.. my PC restarts

This normally indicates a problem with either the soundcard or the graphics card. Make sure that you have the correct drivers for each of the above and also that you have the correct requirements to run the program. To check the names and driver details of the sound and graphics card go to start, and on the right hand side you see 'run'. Click on run and type in dxdiag. This will open up direct x diagnosis program, from here if you go to the display tab it will tell you your make, model and driver details of the graphics card. Then go to the sound tab and it will tell you the above again for your sound card.