You need Windows 8.1 or Windows 10 to host
In order to host, you need Windows 8.1 or Windows 10.
Windows 7, macOS and Ubuntu are not supported for hosting, but you can install Parsec on these to connect to a Windows 8.1 or better host computer.
If your computer is listed on your Computers page, hosting is on. It will look like this:
If that's not on, please visit the host settings for your computer and enable hosting if you're on Windows 8.1 or greater. Also confirm that your hardware is supported for hosting a Parsec session.