Hi, allow me give you a brief:
Windows Defender Security Center includes five main areas of protection that you can manage and monitor.
Virus & threat protection: includes the Windows Defender Antivirus settings, and it allows you to monitor the malware protection, scan your device for threats, and set up its advance anti-ransomware feature.
Device performance & health: allows you to check the health and performance of your computer, and provides a mechanism to clean up your device to fix errors and slowdown problems.
Firewall & network protection: lets you monitor the status of network connections, and you can configure various Windows Defender Firewall settings.
App and browser control: helps you to protect your device and data from malicious code hidden on apps, files, and websites.
Family options: offers easy access to manage your devices and kids online experience using a Microsoft account.
For a PCs with online access, the main point of focus is the "Firewall & network protection" settings.
- Ping me up via chat for heads up on the necessary checklist implementations to put stuffs intact for all PCs.