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What is companioncore.dll?

Part of Windows Live Messenger Companion by Microsoft

What is it?

Windows Live Messenger (formerly named MSN Messenger) is an instant messaging client part of Microsoft's Windows Live. Windows Live Messenger uses the Microsoft Notification Protocol (MSNP) over TCP (and optionally over HTTP to deal with proxies) to connect to Microsoft Messenger service.
Download Boost and enjoy your PC. Speed up Windows Live Messenger Companion and optimize your PC.

How is companioncore.dll loaded?

Internet Explorer BHO - The companioncore.dll BHO has a registered CLSID of {9FDDE16B-836F-4806-AB1F-1455CBEFF289}. A Browser Helper Object (BHO) is a module designed as a plugin for Microsoft's Internet Explorer web browser to provide added functionality. A BHO can introduce visible changes to a IE's interface, such as installing toolbars, but it can also run without any change to the interface.
Internet Explorer extension - companioncore.dll has a CLSID (globally unique identifier) of {0000036B-C524-4050-81A0-243669A86B9F}. Browser extensions allow applications to add functionality to the browser and change the user interface in a way that is not directly related to the viewable content of Web pages.
Windows Live Messenger Companion is loaded by:


What is the community is seeing?What is the community is doing?
About 0.6% of all Boost users have the companioncore.dll file.Of the 0.6% of companioncore.dll users, 10.0% have disabled it.
Typical file (disk image) location:
C:\Program Files\windows live\companion\companioncore.dll

Are there other versions of Windows Live Messenger Compani...?

What else is related?

What Windows OS versions does this run on?

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 7 Home Premium (6.1.7600.0)
Windows 7 Home Basic (6.1.7601.65536)
Windows 7 Home Premium (6.1.7601.65536)
Windows 7 Professional (6.1.7601.65536)
Windows 7 Ultimate (6.1.7601.65536)
Windows 7 Home Premium (6.1.7601.65536)
Windows 7 Ultimate (6.1.7601.65536)
Windows 8 Pro (6.2.9200.0)
Windows 8 Pro (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: companioncore.dll
Publisher: Microsoft Corporation (verified)
Name: Windows Live Messenger Companion
Description: Windows Live Messenger Companion Core
Version: 15.4.3538.0513
Size: 384.38 KB
Original file name: companioncore.dll

Digital certificate

Certificate authority: Microsoft Corporation

Internet Explorer BHO details

CLSID: {9FDDE16B-836F-4806-AB1F-1455CBEFF289}

Internet Explorer extension details

CLSID: {0000036B-C524-4050-81A0-243669A86B9F}

Image hashes

MD5: 0ee505f20817f13dea0c6907a94469d2
SHA-1: 6ba39bec867dca83c13fa3550a3a914c996745c5
SHA-256: 879eb5d2c17418857717d419f6265799e1e4e9309e4bb787fcb32d39fc21d9c5

PE image details

File packed: No
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