The following registry patch will disable the lock screen in Windows 10. After applying this patch, your computer will boot directly to the sign-in prompt. The download is a ZIP file, so you’ll need to extract it before you can merge the .reg file into your registry.  This file comes without warranty – use at your own risk.  If you want to disable the background image on the sign-in screen, I’ve created a post about that as well.

Download: Win10_DisableLockScreen.zip