Yes, you need Windows Firewall, also known as Microsoft Defender Firewall. It's crucial for protecting your computer from unauthorized access, even if you have another firewall already installed.
Here's why:
- Defense in Depth: Using multiple layers of security, including Windows Firewall alongside other security software, provides a more robust defense against various threats. If one layer fails, the others can still protect you.
- Built-in Protection: Windows Firewall is integrated directly into the operating system, providing fundamental protection against network-based attacks. It's configured by default to block unsolicited incoming connections.
- Network Profiles: Windows Firewall allows you to customize its behavior based on the network you're connected to. You can choose between:
- Domain network: Used for networks in a corporate environment.
- Private network: Used for home networks.
- Public network: Used when connected to public Wi-Fi hotspots. Each profile has different security settings appropriate for the level of trust you should place in the network.
- Blocking Unauthorized Access: The primary purpose of a firewall is to prevent unauthorized access to your computer from external sources, such as hackers or malicious software.
- Outbound Protection: While often focused on inbound connections, Windows Firewall can also be configured to monitor and control outbound connections, preventing malicious software from communicating with external servers.
In conclusion, keeping Windows Firewall enabled is a vital security practice, providing an essential layer of defense against network-based threats, regardless of any other security software you may have installed.
