Ex.No .1 1.Start and Shut Down a Computer System 2.Start a computer system Press the computer’s Power button. 3.If the monitor is not turned on, press the Power button on the monitor. When the computer has finished booting, it will show a dialogue box that will ask for a username and password. Enter your username and password, then click “→ ” (the submit button) or press the Enter key on keyboard. Shut down a computer system (Windows 10) Method 1 Click the Start icon (at the bottom left corner). Click the Power icon on the main menu. Click Shut down.