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What is npctrl.dll?

Part of Silverlight Plug-In by Microsoft

What is it?

Microsoft Silverlight is a free web-browser plug-in that enables interactive media experiences, rich business applications and immersive mobile apps.
Description of npctrl.dll from Microsoft
Microsoft Silverlight is a powerful tool for creating and delivering rich Internet applications and media experiences on the Web. Silverlight 5 builds on the foundation of Silverlight 4 for building business applications and premium media experiences. Silverlight 5 introduces more than 40 new features, including dramatic video quality and performance improvements as well as features that improve developer productivity.
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How is npctrl.dll loaded?

Google Chrome plugin - npctrl.dll runs within the context of the Google Chrome web browser as plugin. Chrome supports browser plugins that run as an unrestricted separate process outside the browser and cannot be sandboxed as tabs. Plugins are generally used to add functions to the Chrome browser.
Mozilla plugin - npctrl.dll runs within the context of the Mozilla Firefox web browser as plugin. npctrl.dll is typically associtated with identifier name of Ag Player with and identifier of SOFTWARE\Wow6432Node\MozillaPlugins\@Microsoft.com/NpCtrl,version=1.0. Plugins help the Mozilla Firefox Web browser perform specific functions like viewing special graphic formats or playing multimedia files like Adobe Flash or Apple QuickTime.


What is the community is seeing?What is the community is doing?
About 0.2% of all Boost users have the npctrl.dll file.Of the 0.2% of npctrl.dll users, 30.0% have disabled it.
How resource intensive is the loaded module npctrl.dll?
Comparison based on the average resource utilization across all programs.
                              0.00327319% CPU272.8%
Average thread CPU utilization across all loaded modules is 0.00120%.
108 context switches/sec720.0%
Average context switches for all programs is 15 per second.
Typical file (disk image) location:
C:\Program Files\microsoft silverlight\4.0.50401.0\npctrl.dll

Are there other versions of Silverlight Plug-In?

What else is related?

What Windows OS versions does this run on?

Microsoft Windows XP (5.1.2600.131072)
Microsoft Windows XP (5.1.2600.196608)
Windows Vista (TM) Home Premium (6.0.6001.65536)
Windows Vista (TM) Business (6.0.6002.131072)
Windows Vista (TM) Home Basic (6.0.6002.131072)
Windows Vista (TM) Home Premium (6.0.6002.131072)
Windows Vista (TM) Ultimate (6.0.6002.131072)
Windows Vista (TM) Home Premium (6.0.6002.131072)
Windows 7 Professional (6.1.7600.0)
Windows 7 Home Premium (6.1.7600.0)
Windows 7 Ultimate (6.1.7600.0)
Windows Vista (TM) Ultimate (6.1.7600.0)

About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: npctrl.dll
Publisher: Microsoft Corporation (verified)
Name: Silverlight Plug-In
Description: 4.0.50401.0
Version: 5.1.20513.0
Size: 1.15 MB
Original file name: npctrl.dll

Digital certificate

Certificate authority: Microsoft Corporation

Resource utilization

Total CPU: 0.0032731885%
Privileged CPU: 0.0032731885%
Context switches /sec: 108
Module memory size: 1.19 MB

Google Chrome plugin details

Name: npctrl.dll

Mozilla plugin details

Name: Ag Player
Command: SOFTWARE\Wow6432Node\MozillaPlugins\@Microsoft.com/NpCtrl,version=1.0

Image hashes

MD5: f045df7af127dc4bcc53421850114e15
SHA-1: ef143fd3c45dc6416dc57ccf82c3e1530d9142c3
SHA-256: 87b64ab1e9245d8810544a840f72e6ea32bbe3f57f2288c79fbf9dc2be77718d

PE image details

File packed: No
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