Win10 preview version 9879 keyboard indicator is not lit?

Computer store news: Attentive friends found that this update not only brought these new features to everyone, but also a very strange problem in front of everyone: the keyboard indicator is not lit!

Although this problem does not affect the use of key functions such as the numeric lock button and the case lock button, there is no indication of the indicator light, which is bound to cause great inconvenience to everyone.

Until the deadline for publication, Microsoft officials did not respond to this question, and there is no fundamental way to solve the problem online. The current guess may be caused by poor support for keyboard drivers in the latest version of Win10.