Libreelec is not application. It is whole OS set to run specific set of apps. You can't install it on your Windows PC.
Ohh, for that reason the problem was happening. But I run Windows 11, is it possible to install this OS on it?
I was searching online and got this article that said the disadvantage of both OS install together. So I am little bit worried about this. But it is very important to install. Is there any other way that I may be able to install it?