Hi asaunders,
Thank you for using the Apple Support Communities! We understand when pairing your Beats headphones to your PC laptop, you are unable to use the microphone but you can hear through them. We'd like to help.
Try the steps suggested in the articles below. Both articles will lead you to checking your sound settings on your PC to ensure your Beats are selected as the input source.
If you can't connect to your wireless Beats product - Apple Support
Sound troubleshooting – Beats headphones and earphones - Apple Support
If the issue is isolated to your PC only, meaning you can use your Beats on other compatible devices, iOS, or Mac, then you may want to consider checking in with HP to troubleshoot the input settings for the microphone, too.
Best regards.