As mentioned before this is likely the most recent how-to:
https://www.hagensieker.com/wordpress/2018/07/17/op25-for-dummies/
https://www.hagensieker.com/wordpress/2018/07/17/op25-for-dummies/
A year ago I wrote this, when it was just starting to be a thing to install OP25 on a
Raspberry Pi:
http://kb9mwr.blogspot.com/2017/07/listening-to-local-700-mhz-simulcast.html
http://kb9mwr.blogspot.com/2017/07/listening-to-local-700-mhz-simulcast.html
While I don't have any desire to run op25 on Windows, unfortunately I can see a good
how-to on that sort of thing being desirable to many.
I am a ham and I like to tinker, not just be a end user. So I don't see anyone using
this on Windows really contributing anything back to the community. I really urge people
to dig into things deeper than skin level, you never know, you just might learn something.
But that is just me.