Turn on the system firewall function: Windows 7 system security settings

When the user firewall is closed, the "white flag" icon in the notification bar will appear a red cross prompt user "firewall" close prompt! The firewall is a protective door in the Windows
system. If it is closed, it is vulnerable to virus intrusion, so we have to open this door to prevent virus intrusion.

Operation steps

1, click on “Start”Menu opens “Control Panel”.

1, select “System & Security" in “Control Panel”.

3. Click on “Windows Firewall" in the System & Security panel.

4. Click “Use recommended settings”.

5, after the firewall is started! Under the notification bar, the "white flag" icon has disappeared.

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