Have a read of this click here which might help on one point.
I think on Defender, although I do not use it the program is a full time protection and it is not recommended to run two at a time. it could lead to a system crash.
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.