@zoltan002 

Hi, welcome to the community.

Would there be any error message when the Windows laptop can't use the webcam and microphone?

Have you tried to set the Deco as a Private Network on the laptop, such as

https://answers.microsoft.com/en-us/windows/forum/all/how-to-change-from-public-to-private-network/dbdb7d55-044b-4e29-9694-866dedd374bd

Wait for your reply and best regards.