Every day some people are saying that the new Virus is being created. Who makes company anti-Virus? What and why it is important if the windows system defender already install in the system then what is the use of antivirus in system. So, I recommend that the system defender not fully defend viruses.
The virus is also made. But so, you have to update every day to prevent an attack of new virus
As per the update, the latest definition files from the update will also be torn and identify a new virus.