Windows10
From Leaky
Enabling the Windows 10 lock screen image information
Click on Start > Run and type control userpasswords2 to open the user management dialog. Click on the Advanced tab and untick the checkbox at the bottom for Require users to press Ctrl-Alt-Delete
Comparison of files or folders
Install WinMerge from winmerge.org - it includes a shell extension to allow easy comparison of files or folders.