I believe Windows 8 introduced the group policy to set a default lock screen image (https://technet.microsoft.com/en-us/itpro/windows/whats-new/windows-spotligh

I believe Windows 8 introduced the group policy to set a default lock screen image (https://technet.microsoft.com/en-us/itpro/windows/whats-new/windows-spotlight https://technet.microsoft.com/en-us/itpro/windows/whats-new/...). Since Enterprise is the only LTSB SKU, I would assume some sort of group policy is also being deployed. Wouldn't be too hard to set that policy up, which disables Spotlight automatically.