I want to tell everyone how they can lock their computer. This feature will be very useful especially if you are working in a company that shares the same network of computers. While going on a lunch break you do not want anybody to mess up with your computer and turning it completely off and then on when you are back might take too much time. In order to lock your computer, press the Windows button, which is located at the bottom left side of your keyboard and the letter L at the same time. Now you are free to go. After coming back just press Ctrl + Alt + Delete and insert the right password. Remember however that this solution might not work in every computer network. If it does not work, ask your network administrator for tips on how to make this feature possible on your computer.