You don’t need to use windows defender to scan, naren17 —malewarebytes is a good free program I would certainly have, it’s not real time. But a good scanner for back up.
I have had windows defender running for years because it’s real time.
I don’t see any problem having it.
Some can say windows firewall is a waste of time.

My set up is simple

Avast
Comodo firewall & DNS server
Windows defender
Malewarebytes
& hard firewall