What is msacm32.drv?

Please read below to decide for yourself whether the msacm32.drv on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Msacm32.drv file information

The process known as Microsoft Sound Mapper belongs to software Microsoft Windows Operating System by Microsoft (

Description: Msacm32.drv is not essential for the Windows OS and causes relatively few problems. Msacm32.drv is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 20,480 bytes (56% of all occurrences) or 20,992 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. The msacm32.drv file is not a Windows system file. It can change the behavior of other programs or manipulate other programs. The msacm32.drv file is a trustworthy file from Microsoft. msacm32.drv appears to be a compressed file. Therefore the technical security rating is 46% dangerous.

Recommended: Identify msacm32.drv related errors

Important: Some malware disguises itself as msacm32.drv, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the msacm32.drv 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

3 users think msacm32.drv is essential for Windows or an installed application.

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Best practices for resolving msacm32 issues

A clean and tidy computer is the key requirement for avoiding problems with msacm32. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the msacm32.drv process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

msacm32.drv [all]