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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?

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.
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.
Silverlight Plug-In is loaded by:


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, 33.0% have disabled it.
How resource intensive is the loaded module npctrl.dll?
Comparison based on the average resource utilization across all programs.
                              0.02250181% CPU1875.2%
Average thread CPU utilization across all loaded modules is 0.00120%.
86 context switches/sec573.3%
Average context switches for all programs is 15 per second.
Typical file (disk image) location:
C:\Program Files\microsoft silverlight\4.1.10111.0\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)
Microsoft Windows XP (5.2.3790.131072)
Windows Vista (TM) Home Premium (6.0.6000.0)
Windows Vista (TM) Home Basic (6.0.6001.65536)
Windows Vista (TM) Home Premium (6.0.6001.65536)
Windows Vista (TM) Ultimate (6.0.6001.65536)
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 Vista (TM) Ultimate (6.0.6002.131072)

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: 4.1.10111.0
Version: 5.1.10411.0
Size: 1.15 MB
Original file name: npctrl.dll

Digital certificate

Certificate authority: Microsoft Corporation
Expiration date: 1/11/2013

Resource utilization

Total CPU: 0.0225018093%
Privileged CPU: 0.0197926440%
User CPU: 0.0027091652%
CPU Cycle count /sec: 6,511,455
Context switches /sec: 86
Module memory size: 1.19 MB

Mozilla plugin details

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

Google Chrome plugin details

Name: npctrl.dll

Image hashes

MD5: 9013599b12923a45c029c34e8d2211ac
SHA-1: 071f55ebc261d7740f36e5fdd10c9274e2983597
SHA-256: 6731425ffa94226bb89fb7b3153bf356049c22048a992f6a3081a4ab893e157f

PE image details

File packed: No
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