To activate the UPnP function in Windows OS:
Ex: Windows XP:
Windows component installation.
1.Click Control Panel
2.Click Add/Remove Programs
3.Click Add/Remove Windows Components
4.Click Networking Services
5.Click Detail
6.Check / add UPnP User Interface
Firewall settings
1.Click Windows Firewall in the Control Panel
2.Open Windows firewall option
2.Click Exceptions
3.Check UPnP configuration and edit ports, if needed.
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