What is msacm32.drv?
msacm32.drv is part of Microsoft® Windows® Operating System and developed by Microsoft Corporation according to the msacm32.drv version information.
msacm32.drv's description is "Microsoft Sound Mapper"
msacm32.drv is digitally signed by Microsoft Windows Component Publisher.
msacm32.drv is usually located in the 'C:\WINDOWS\system32\' folder.
None of the anti-virus scanners at VirusTotal reports anything malicious about msacm32.drv.
If you have additional information about the file, please share it with the FreeFixer users by posting a comment at the bottom of this page.
Vendor and version information [?]
The following is the available information on msacm32.drv:
| Property | Value |
|---|---|
| Product name | Microsoft® Windows® Operating System |
| Company name | Microsoft Corporation |
| File description | Microsoft Sound Mapper |
| Internal name | Microsoft Sound Mapper |
| Original filename | msacm32.acm |
| Legal copyright | © Microsoft Corporation. All rights reserved. |
| Product version | 5.1.2600.0 |
| File version | 5.1.2600.0 (xpclient.010817-1148) |
Here's a screenshot of the file properties when displayed by Windows Explorer:
| Product name | Microsoft® Windows® Operating System |
| Company name | Microsoft Corporation |
| File description | Microsoft Sound Mapper |
| Internal name | Microsoft Sound Mapper |
| Original filename | msacm32.acm |
| Legal copyright | © Microsoft Corporation. All rights.. |
| Product version | 5.1.2600.0 |
| File version | 5.1.2600.0 (xpclient.010817-1148) |
Digital signatures [?]
msacm32.drv has a valid digital signature.
| Property | Value |
|---|---|
| Signer name | Microsoft Windows Component Publisher |
| Certificate issuer name | Microsoft Windows Verification Intermediate PCA |
| Certificate serial number | 6102307e000000000006 |
VirusTotal report
None of the 51 anti-virus programs at VirusTotal detected the msacm32.drv file.
Folder name variants
msacm32.drv may also be located in other folders than C:\WINDOWS\system32\. The most common variants are listed below:
- D:\WINDOWS\system32\
- E:\WINDOWS\system32\
- C:\WINDOWS.0\system32\
- C:\WINDOWS1\system32\
- I:\WINDOWS\system32\
- H:\WINDOWS\system32\
- F:\WINDOWS\System32\
- C:\WINDOWS2\system32\
- C:\WINEXP\system32\
- C:\WINXP\system32\
- G:\WINDOWS\system32\
- Y:\WINDOWS\system32\
- D:\WINDOWS6\system32\
- C:\WINNT\system32\
- C:\WINDOWSC\system32\
- C:\WINDOWS.1\system32\
Hashes [?]
| Property | Value |
|---|---|
| MD5 | 9a3bd5f55aadff859539142f6328a66e |
| SHA256 | b8165f650f0e24d380601d54bc81a84c06d886a6cf995ea6ca63eabcfa75554a |
What will you do with msacm32.drv?
To help other users, please let us know what you will do with msacm32.drv:
What did other users do?
The poll result listed below shows what users chose to do with msacm32.drv. 9% have voted for removal. Based on votes from 109 users.
Malware or legitimate?
If you feel that you need more information to determine if your should keep this file or remove it, please read this guide.
And now some shameless self promotion ;)
Hi, my name is Roger Karlsson. I've been running this website since 2006. I want to let you know about the FreeFixer program. FreeFixer is a freeware tool that analyzes your system and let you manually identify unwanted programs. Once you've identified some malware files, FreeFixer is pretty good at removing them. You can download FreeFixer here. It runs on Windows 2000/XP/2003/2008/2016/2019/Vista/7/8/8.1/10. Supports both 32- and 64-bit Windows.
If you have questions, feedback on FreeFixer or the freefixer.com website, need help analyzing FreeFixer's scan result or just want to say hello, please contact me. You can find my email address at the contact page.
Comments
Please share with the other users what you think about this file. What does this file do? Is it legitimate or something that your computer is better without? Do you know how it was installed on your system? Did you install it yourself or did it come bundled with some other software? Is it running smoothly or do you get some error message? Any information that will help to document this file is welcome. Thank you for your contributions.
I'm reading all new comments so don't hesitate to post a question about the file. If I don't have the answer perhaps another user can help you.
Lorsi Koil writes
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# 22 Jan 2026, 16:40
Ying Ashley writes
msacm32.drv is a legitimate file part of the Microsoft Windows Operating System, associated with the Microsoft Sound Mapper. It's digitally signed by Microsoft, and no antivirus scanners have flagged it as malicious. For students needing academic support, MyAssignmentHelp offers excellent assignment help Australia to assist with your studies. Visit: https://myassignmenthelp.services/
# 9 Feb 2026, 3:24
Roger Karlsson writes