To setup Chromecast 1st generation on your PC:
Hey there 12mile,
I'm sorry to say, but you are correct. If you check out the article on setting up your Chromecast device, there is a note saying "We no longer support Chromecast setup on a computer. To set up your Chromecast, use a mobile device."
At this point in time, the only way to set up your Chromecast device is by using the Google Home app. I'm really sorry for any inconvenience this may cause you.
If you had any other questions or concerns, please let me know.
Awesome, I'm glad to hear that everything is working again! In that case, I'll go ahead and lock the thread. As always, feel free to make a new thread if you have any more questions or concerns.
Thank you for your help, djtetei!