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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. Microsoft has made the Silverlight browser plug-in freely available for all s
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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\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.


What is the community is seeing?What is the community is doing?
About 0.1% of all Boost users have the npctrl.dll file.Of the 0.1% of npctrl.dll users, 27.0% have disabled it.
How resource intensive is the loaded module npctrl.dll?
Comparison based on the average resource utilization across all programs.
                              0.00791748% CPU659.8%
Average thread CPU utilization across all loaded modules is 0.00120%.
58 context switches/sec386.7%
Average context switches for all programs is 15 per second.
Typical file (disk image) location:
C:\Program Files\microsoft silverlight\4.0.60310.0\npctrl.dll

What else is related?

What Windows OS versions does this run on?

Microsoft Windows XP (5.1.2600.196608)
Windows 7 Ultimate (6.1.7600.0)
Windows 7 Ultimate (6.1.7601.65536)
Windows 7 Ultimate N (6.1.7601.65536)
Windows 7 Home Premium (6.1.7601.65536)
Windows 7 Ultimate (6.1.7601.65536)
Windows 8 (6.2.9200.0)

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: 4.0.60310.0
Version: 4.0.60310.0
Size: 1001.82 KB
Original file name: npctrl.dll

Digital certificate

Certificate authority: Microsoft Corporation
Effective date: 2/21/2011
Expiration date: 5/21/2012

Resource utilization

Total CPU: 0.0079174759%
Privileged CPU: 0.0072836246%
User CPU: 0.0006338512%
CPU Cycle count /sec: 1,049,860
Context switches /sec: 58
Module memory size: 1012 KB

Mozilla plugin details

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

Google Chrome plugin details

Name: npctrl.dll

Image hashes

MD5: 8e151a2a185daf9852322028abe55534
SHA-1: 43e6b5d7a6b24e247e5c1aa7b09398e53ac2d293
SHA-256: 413e51cfcce50b04f1d163c2b3fff7a8665c34e62e020ff0dd84d00c90b90720

PE image details

File entropy: 6.69408
File packed: No
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