Which channel do you use? Your phone and notebook are not blocked, right?

Add device to parental control, then click Pause button to stop internet access of devices in the profile.

Reset the deco. Configure it when it's flashing blue. If that failed too, use another Deco as the main one, then add the other Deco. When adding another Deco, reboot the main one; or connect the new...

Cannot set up whitelist. Check log of Antivirus. Is there anything related to youtube? May disable antivirus to see what happens. Contact tplink if problem not solved.

You may disable trend micro. I guess before you purchase the Deco, you were using another router, right? Do you need to set up IPTV VLAN tag? For some IPTV, VLAN tag is necessary to set up on the...

Do you connect your NAS to the Deco through Ethernet? What's the IP address of the NAS? Is it obtainning IP address automatically? What does that mean--switch from LAN IP to WAN IP?