What is a good Android OS to download?

Hi,
which is the good Android OS available to download, which I can set up on PC? And I expect to control it using PC Keyboard and mouse. Thanks

Welcome to Android Central! Check out this article: How to Run Android on Your PC: The Best Android Emulators

Thanks. where can I get the relevant download of the OS you mentioned?

Any other help?

I'd just search for the programs mentioned in that link. Are you having difficulty finding them?