1. From the system tray, near the system clock, click on the AVG Internet Security icon to open the main console window.
2. Click on Firewall, in the AVG Internet Security window.
3. Select Firewall profile under Firewall settings to determine the type of profile.
4. Click on Tools menu bar, followed by select Firewall settings from the menu list.
5. On the left part of the window, click on the “+” sign beside the type of firewall profile type.
6. Click on Applications
7. Check if Windows Live Messenger is listed on the List of applications. If you see an entry for Windows Live Messenger, ensure if it has a (check) mark besides it. If there is a (question) mark, go to step 8 to 10.
8. Select the word “Windows Live Messenger” on the list then click on the edit button.
9. On the Application Action, click on the dropdown menu then select "Allow for all"
10. Click on Apply then OK.
11. If you don’t see an entry for Windows Live Messenger, then click on Add.
12. Enter “Windows Live Messenger” (without quotes) under Name. Select Allow for all in the Application action drop down list to proceed to browse to the next step.
13. Click on to browse to the desired path. If you are using Windows Live Messenger 8.1, browse for Windows Live Messenger by going to C:\Program Files\MSN Messenger\MSNMSGR.exe. If you are using Windows Live Messenger 8.5 or later, browse for Windows Live Messenger by going to C:\Program Files\Windows Live\Messenger\MSNMSGR.exe.
14. Click on Open to select the file. The default path will appear as below. Click Apply.