What is BtMmHook.dll?

The genuine BtMmHook.dll file is a software component of Bluetooth Software by Broadcom.
A software hook for Bluetooth multimedia devices, this Broadcom application runs in the background when a Bluetooth device is connected to your PC. A software hook is a method in which certain functions or procedures are modified or redirected for use with outside software. This hook allows your Bluetooth device to perform its primary function through your OS. Located in Irvine, California, Broadcom is a Fortune 500 semiconductor company that has a strong focus on network hardware.

BtMmHook stands for Bluetooth Multimedia Keys Hook

BtMmHook.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if BtMmHook.dll is a Windows system file or if it belongs to an application that you can trust.

Click to Run a Free Scan for BtMmHook.dll related errors

BtMmHook.dll file information

The process known as Multimedia Keys Hook DLL or WIDCOMM Bluetooth Software (version,

belongs to software WIDCOMM Bluetooth Software or Bluetooth Software or Broadcom Bluetooth Software or Broadcom (version 2070 Bluetooth) or HP Integrated Module with Bluetooth wireless or HP Integrated Module with or ThinkPad Bluetooth with Enhanced Data Rate or Lenovo Bluetooth with

by Broadcom (

Description: BtMmHook.dll is not essential for the Windows OS and causes relatively few problems. BtMmHook.dll is located in the C:\Windows\System32 folder or sometimes in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 208,896 bytes (91% of all occurrences), 212,992 bytes, 221,184 bytes, 77,824 bytes or 73,728 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The program is not visible. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. BtMmHook.dll is not a Windows core file. The software can be uninstalled in the Control Panel. BtMmHook.dll is able to record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 56% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you still experience problems with BtMmHook.dll, you may want to go to the support area [1][2] of the Dell website or remove the entire program WIDCOMM Bluetooth Software or HP Integrated Module with using Windows Control Panel.

Recommended: Identify BtMmHook.dll related errors

Important: Some malware disguises itself as BtMmHook.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the BtMmHook.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

btmmhook.dll is part of Bluetooth Software developed by Broadcom Corporation. Comes either with WIDCOMM or Lenovo or ThinkPad.
it can prevent Winsock from functioning properly (it blocks packages)
  w korte  
Broadcom Corporation ist ein Teil von der Bluetooth Software!
  Thomas Toelle   (further information)
I was just advised to not keep it because of its recording capabilities re privacy/security issues.
Prevents iTunes from Stopping immediately. Instead a message 'one or more programs use the iTunes Scripting Interface' is displayed.

Rating chart

Summary: Average user rating of BtMmHook.dll: based on 6 votes with 6 user comments. 5 users think BtMmHook.dll is essential for Windows or an installed application. One user suspects danger. 2 users don't grade BtMmHook.dll ("not sure about it").

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Best practices for resolving BtMmHook issues

A clean and tidy computer is the key requirement for avoiding problems with BtMmHook. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the BtMmHook.dll process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

BtMmHook.dll [all]