Use your Windows password for your screen saver password
You can help make your computer more secure by creating a screen saver password, which locks your computer when the screen saver is on. The screen saver password is the same password that you use to log on to Windows.
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Open Screen Saver Settings by clicking the Start button 
, and then clicking Control Panel. In the search box, type screen saver, and then click Set screen saver password.
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Select the On resume, display logon screen check box, set a time when you want the screen saver to start, and then click OK. (Choose a time that's not long enough for an unauthorized person to use your computer, but not so short that if you stop working at your computer for a moment, the screen saver locks it.)
