How do I check Windows Firewall? (Windows XP)

In case that UPnP software does not work properly, check the configuration of "Windows Firewall" with the following procedure.

1. Click [Start] - [Control Panel] - [Network and Internet Connections] - [Network Connections].
   
2. Double-click [Local Area Connection].
3. Click [Properties] in the "Local Area Connection Status" window.
   
4. Click the "Advanced" tab in the "Local Area Connection Properties" window, then click [Settings].
   
5. If there is a check mark in the box of "Don't allow exceptions", uncheck it.
   If "Windows Firewall" is disabled, you do not have to check other settings. Click [OK] to close the window.
   
   
6. Click the "Exceptions" tab.
   Check an appropriate (using) program (software name) and service if there is no check mark in the box 
   
   
7. Click [OK] in each window, then close it.