Perhaps you do not even know what blocking a Windows 10 session after you turn on the screensaver, but you probably use this option quite often, just call it much easier...
Suppose that you have the option that is responsible for enabling the screen saver in Windows 10, therefore, after some time of inactivity of your computer, your "Desktop" will change the appearance, as it will display the screen saver you selected earlier. After this kind of locking the "Desktop", the user's session will be blocked ... Here only there is one thing that is that the session itself is locked only after 5 seconds, provided that the user does not have anything to press on the keyboard or mouse. The delay of 5 seconds is made in order for the user to change his mind to rest and return to his work. But there is in this in all one small "BUT", which lies in the fact that 5 seconds for most users are few, because often they do not rest, but are diverted to work in the real world, and therefore, the time of blocking would be worth doing More that from time to time do not enter a user password.
In order to bring us the necessary changes to the system, you need to use the command "regedit", which will open the "Registry Editor", where you actually get the opportunity to go the way you need to make changes to the operating system: HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon.
Having reached the last subsection, boldly create in it a new, 32-bit parameter of type DWORD. The new parameter should be called "ScreenSaverGracePeriod". 
The parameter you created will need to be set to a numeric value from 0 to 2147483. Note that the numerical value you specify must be in decimal notation. 
That is the number that you set in the parameter you created, and it will be a time interval, blocking the Windows 10 session after turning on the screensaver. The larger the numeric value, the longer it will not lock out, and the smaller the numeric value, the faster the lock will be activated.
It should also be noted that the changes you made to the "ScreenSaverGracePeriod" parameter will be applied to all accounts automatically!
If necessary, return to the 5-second time interval, you just simply need to remove "ScreenSaverGracePeriod" from the operating system.
