K karlsnooks BSOD Kernel Dump Analyst Joined May 31, 2012 Posts 94 Sep 29, 2012 #1 Change Win 8 Lock Screen (the screen you get with you use WIN + L to "lock") HOW TO CHANGE THE LOCK SCREEN IN WIN 8 START screen | Click on your Name or Account picture (top-right) | Choose Change Account Picture | Lock screen (above your account picture) | Browse (unless you want one of the supplied lock screens) | Navigate to the desired picture. Win 8 will fit the picture to your display resolution. | click on desired picture | Choose picture button The upper limit on picture size in terms of number of bytes is more tolerant than with Win 7. I do not know the upper limit. You will notice that Start | click on Name | Gives you the option to change your Account Picture and the Start Screen.