10Gigabit LAN

Why does norton 360 net slow down my 10Gigabit LAN?

LAN network real speed is 9.50Gbps without Norton360 installed. When I install Norton360 speed drops down to 1.5Gbps… 1.5Gbps!!!
The speed is between my desktop and synology.

Is there a setting that can be changed to not lose speed with norton 360 installed???

fwiw ~ regarding Synology here & here

Caveat: I’m not familiar with Synology NAS