Hi, I'm Elise, and I'd be happy to help with your issue.
There are any types of applications which will generate self-certificated certificates, these are usually created during installation of the app before you have an opportunity to configure it and install a certificate which has been signed by a CA.
This doesn’t mean that your PC is communicating which anything, certificates such as this are using for when there is a connection made to your computer, not from it.
Where or when are you seeing this certificate?
Kind Regards,
Elise