@margosa Today it even lost connection on Guest network. I turned off Guest network and then turned it back on. My laptop got the wifi back.

@David-TP Thanks for the reply. It works well on the guest network.

My laptop cannot connect to my wifi since I upgraded th firmware to 1.6.1. The other devices don't have any issue. My laptop is still able to connect to other wifi, such as hotspot. Please advise.

@Carl I always had "random hardware address" OFF.

@Carl Thank you. But it is a Windows 11 system.

I have Deco M9 Plus and tried to block kids from watching too much Youtube. I put "youtube" in Blocked content in Parental Control, but it doesn't work. Please help. thanks.