I had the same problem than here:How to open Android SDK manager from terminal?
That question was marked as duplicated of this one: How to open then the Android SDK Manager through the terminal?
But, as you can see in the comments it's really not a duplicated one because the problem is different.
Anyway, neither of the answers to either question solved the problem for me.
I have downloaded Android SDK, Command line tools only for Windows 10. And when I run: .\sdkmanager.bat
, I get this message: [=======================================] 100% Computing updates...
but nothing happens.
I have installed Java and everything seems to be ok.