upnpui.dll
UPNP Tray Monitor and Folder by Microsoft
This is a Windows system installed file with Windows File Protection (WFP) enabled.
Overview
There are 6 versions of upnpui.dll in the wild, the latest version being 5.1.2600.5512 (xpsp.080413-0852). The average file size is about 234 KB. 
What is upnpui.dll?
The Universal Plug and Play (UPnP) implementation provides an architectural framework for creating self-configuring, self-describing devices and services. Because UPnP supports automatic discovery, devices managed by UPnP require no set up by users or network administrators. UPnP enables a device to dynamically join a network, obtain an IP address, and convey its capabilities upon request.
About upnpui.dll (from Microsoft)
“Universal Plug and Play (UPnP) is a distributed, open networking architecture that enhances peer-to-peer network connectivity for personal computers, wireless devices, and other intelligent appliances”
|  Details
 | 
| File name: | upnpui.dll | 
| Publisher: | Microsoft Corporation | 
| Product name: | UPNP Tray Monitor and Folder | 
| Description: | Microsoft® Windows® Operating System | 
| Typical file path: | C:\Windows\System32\upnpui.dll | 
 Behaviors
Behaviors
(Note, the behaviors below are for all versions of upnpui.dll, select a unique version for details.)
Shell service object delay loads
Approved shell extensions
Located in the registry at 'SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved'
- CLSID: {e57ce731-33e8-4c51-8354-bb4de9d215d1}
 All file variations of upnpui.dll
All file variations of upnpui.dll
 Distribution by Windows OS
Distribution by Windows OS
| OS version | distribution | 
| Microsoft Windows XP | 97.89% |  | 
| Windows 7 Home Premium | 2.11% |  | 
 Distribution by country
Distribution by country
United States installs about 46.32% of UPNP Tray Monitor and Folder.
 Distribution by PC manufacturer
Distribution by PC manufacturer
| PC Manufacturer | distribution | 
| Dell | 44.16% |  | 
| Hewlett-Packard | 18.18% |  | 
| Toshiba | 15.58% |  | 
| Compaq | 10.39% |  | 
| Intel | 5.19% |  | 
| GIGABYTE | 3.90% |  | 
| Acer | 2.60% |  |