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What Is Universal Plug-and-Play (UPnP)
UPnP is a way of easily connecting to hardware devices (like printers or scanners) over a network.

If your printer or other hardware connects to your network and is not plugged directly into your computer, then you may need this service. If not, it is unlikely you are using UPnP, and it is safer to turn this service off.

This is also use by Windows' Internet Connection Sharing. If you're using that, leave this service turned on.


This affects Windows ME and XP.


Bottom Line: UPnP is a rarely used Windows feature that has had several security holes. It is recommended that you do disable UPnP unless you do use it now.