Windows 10 is safer and more secure thanks to Windows Defender and Windows Firewall.
When you start up Windows 10 for the first time, Windows Defender is on and working to protect your PC by scanning for malicious software. It will turn itself off if you install another antivirus app.
Windows Defender uses real-time protection to scan everything you download or run on your PC. Turn off real-time protection temporarily by selecting the Start button, and then selecting Settings > Update & security >
To scan specific files or folders, select them, then right-click (or press and hold)and choose Scan with Windows Defender. If Windows Defender finds anything malicious, it will notify you in the app and recommend what you should do next to keep your PC safe.
Windows Firewall filters info coming into your PC from the Internet, blocking potentially harmful programs. To turn it off, go to the search box and type firewall. Then select
Windows Firewall > Turn Windows Firewall on or off.
If your PC is connected to a network, you might not be able to change your Windows Firewall settings because of network policies. Contact your administrator for more info.