Forum Discussion
Does Windows 10 move the lock function from the profile?
Why did Windows 10 had to move the lock function from the profile to the power button?! It was fine the way it was?
Microsoft hasn't given an official reason.
But may be:
Putting all power and session options like Lock, Sleep, and Shut Down in one place means more convenience.
Based on how people use Windows
To make things feel simpler.
----
Other alternatives:
Ctrl + Alt + Delete > Lock
Windows + L