Decrease the time during which you can retrieve the user session when the screensaver is activated

It may be useful to increase the security of our computer...

to change this behavior run the application regedit.exe and select the following key:

[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]

edit or create (if doesn't exist) the following value:

"ScreenSaverGracePeriod"=dword:1

The number represents the seconds during which the user can retrieve the session without having to enter your password.

You must restart the computer to apply any changes.