Hello Hermoso,
Thank you for posting your concern in Microsoft Community.
As an initial recommendation, I suggest you to refer to the below link and check if it helps you to setup Chromecast on your windows PC.
Ref: Chromecast Setup
Further on, I suggest you to refer to the Chromecast Help in Google Supportfor more additional information on the same.
Hope the above information is helpful. If you need further assistance, we would be happy to help you.
Thank you.