Hi rvonkornfeldt,
We understand that Home Sharing isn't working with your PC's, and we'd like to help.
We know you mentioned following some steps in an article; was this the article you were using? Use Home Sharing to share media from a computer to other devices If those are the steps you were using, we'd like to get more information about what you're running into, so we can determine the best way to move forward.
Can you let us know more about what happens when you try to use Home Sharing? For example, are you seeing any error messages or codes?
Are your PC's using the latest version of iTunes for Windows? The below page explains how to ensure iTunes is up-to-date:
Update to the latest version of iTunes
Thanks!