Have you tried disable windows firewall or anti-virus on win10? You can try that and reinstall it.

Generally speaking, the NTP server will sync once it's connected to the internet even it works as Access Point. Do you mean it won't get back to correct time after you reset the device and reconnect...

a little confused about your question. what do you mean 32 mac address or 256 mac addresses? What's your purpose or needs?

Do you guys login to the app with owner account? And you do connect to the corresponding Deco Network?

Antivirus license is based on the main Deco. If you want to extend the license, you can reset those old Deco units and set the new Deco as main AP. And set others as RE to work together.

;) they can work together