Hi @deproocho,
Welcome to the Roku Community.
We understand that you need assistance in casting from your Windows PC to your Roku device. We would recommend taking a look at our Support page for more information regarding this: How to screen mirror your Android or Windows phone to your Roku streaming device.
If you encounter any issues during the process, please don't hesitate to let us know with additional information you may have. We'll do our best to assist you.
Regards,
Nimfa