Lock Screen on my PC??(windows 10 )?

Apart from the obvious , what does lock screen do ? My PC was upgraded from windows 7 to windows 10 . now when my PC is on , and if I leave it for 2 minutes or more unattended, it goes to screen saver . and logon screen & I have to log on again .thats a bit of a nuisance . Ok thanks in advance for... show more Apart from the obvious , what does lock screen do ? My PC was upgraded from windows 7 to windows 10 . now when my PC is on , and if I leave it for 2 minutes or more unattended, it goes to screen saver . and logon screen & I have to log on again .thats a bit of a nuisance . Ok thanks in advance for ideas . PS- I applied lock screen , but nothing appears to have happened .
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