Newbie again, with what may be a kiss-of-death for me. Among devices, I've got 2 Windows desktop PCs, both connected via ethernet, not Wi-Fi. One PC is mine, the master containing the family jewels, to be protected at all costs. The other PC is a kid's. A typical teenager with low attention span, less intelligence, and a gaming addiction. I've got to keep that teenage PC completely isolated from my master.

It seem that Deco forces all ethernet connected devices to the same "master" LAN. Can't put one in the "Guest" network. It that true? Is there no way to isolate one ethernet PC from all other devices on the master/default LAN? The Deco Phone app says no-can-do. Google hints that maybe some extensive firewall editing may work. Any Advice?