My install button in the launcher will not work and install 4.16

That is odd indeed… Have you completely uninstalled the launcher and re-installed (running as administrator)? If this continue to stink for you…you could download from GitHub and compile yourself.

The button will not work its driving me crazy because i cant find another way to download the engine it makes me do it through the launcher and the launcher wont install it.

Few Weeks Ago I had the same problem, Run ‘Epic Games Launcher’ as administrator.
That has solved the problem for me.

Hopefully it will solve the problem for you too.

I have this problem with 4.2.24 too

i had the same problem… i just restart the epic launcher without even as administrator. after click installer within after like 1 min it started.

But my one is working on your process! What should i do?

Problem fixed here : Install Button Unreal Engine is greyed out - YouTube

The problem is Window Firewall. Deactivate or allow the Epic Laucher.