Windows Firewall helps protect your device by filtering network traffic and blocking unauthorized access. It lowers the risk of network security threats by allowing or restricting connections based on specific criteria such as IP addresses, network ports, and application program paths.

Firewalls can be either software or hardware, and most likely you're being protected by both. The router (sometimes called a "modem") that brings the internet from your internet provider to your home or office is usually a hardware firewall. And your computer, whether it's running Windows or macOS, most likely has a software firewall running.

Windows Security App Overview The Windows Security app is a comprehensive security solution integrated into Windows, designed to protect your device and data from various threats. With features like Microsoft Defender Antivirus, Windows Firewall, and Smart App Control, you can easily access and configure robust security settings.

Keeping your computer secure helps you avoid malware and direct hacking attempts designed to steal your personal information. Here are some ways you can help reduce your online risk when you use your computer at home.

A firewall is what controls what is - and more importantly isn't - allowed to pass through those ports. You can think of it like a security guard standing at the door, checking the ID of everything that tries to enter or exit. For most normal computers or home networks, the firewall should allow very little, if any, inbound traffic.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page. In the File Download dialog box, click Run or Open, and then follow the steps in the Windows Security Troubleshooter.

Summary The Windows Security app is a comprehensive security solution integrated into Windows, designed to protect your device and data from various threats. It includes features such as Microsoft Defender Antivirus, Windows Firewall, and Smart App Control, which work together to provide real-time protection against viruses, malware, and other security threats. The app is built into Windows ...

Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

Find out how to fix network connectivity problems when using XBOX multiplayer and chat features on Windows 10/11.

If Forza Horizon 4 or Forza Horizon 5 won’t launch, or if it crashes on your Windows device, we have a number of troubleshooting steps to try.