How to Block Program Access in Windows Firewall

By Gregory Hamel

A firewall is a computer program that helps block unsolicited communications while you are using the Internet. This can reduce chances of being infected by malware like computer viruses and worms. Windows Firewall is a firewall program built into Windows 7 and Windows Vista that provides Windows computers with basic Internet security. Windows Firewall can block programs from accessing the Internet to ensure that they do not cause unwanted data to access your computer.

Step 1

Click "Start," type "Windows Firewall" into the Search box and click "Windows Firewall."

Step 2

Click "Allow a program or feature through Windows Firewall" and select "Change Settings." A Windows Firewall settings window will open to the "Exceptions" tab.

Step 3

Scroll through the list of programs and uncheck the box next to the program that you want to block with Windows Firewall. The checked programs are given exceptions, meaning they are not blocked by the firewall, while the unchecked programs do not have exceptions. If you do not see in the list the program you want to block, click "Add Program," browse for the program, click on it and click "OK." The program will be added to the list.

Step 4

Click "Apply" and select "OK."

Tips & Warnings

  • Microsoft recommends that users keep Windows Firewall or some other software firewall on at all times.
  • Some programs that use the Internet may not function properly if they are blocked by Windows Firewall.
  • A firewall is not a substitute for an anti-virus program.