Thank you for your post and welcome to the Community!
I’m sorry to hear of the issue you are experiencing with background noise with your QC35’s when they are connected to your laptop. I’d love to help you with this!
Can you tell me if you have experienced this same issue when connected to other products?
I would recommend making sure you are running the most recent firmware on the headphones. To do this, head over to the LINK HERE on your laptop and follow the on-screen instructions.
Let me know how you get on!
Jessie O – Community Support
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