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What is alcxwdm?

Alcxwdm.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the OS, hardware etc.
The free file information forum can help you determine if alcxwdm.sys belonging to the Windows system or an application you can trust.

Run a free scan to check for alcxwdm drivers in need of updating

Alcxwdm.sys file information

The process known as Realtek AC'97 Audio Driver or Avance AC'97 Audio Driver belongs to software Windows® WDM driver for Realtek AC'97 Audio(HRTF data Copyright (version 1994 by MIT Media Lab)) or Windows® WDM driver for Realtek AC'97 Audio or Windows® WDM driver for Avance AC'97 Audio or Service for Realtek (version AC97 Audio (WDM)) by Realtek Semiconductor (www.realtek.com.tw) or Avance Logic (www.avance.com).

Description: Alcxwdm.sys is not essential for the Windows OS and causes relatively few problems. alcxwdm.sys is located in the folder C:\Windows\System32\drivers. Known file sizes on Windows 7/XP are 2,279,424 bytes (17% of all occurrences), 2,278,784 bytes and 67 more variants. http://www.file.net/process/alcxwdm.sys.html 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. There is no detailed description of this service. Alcxwdm.sys is not a Windows system file. Alcxwdm.sys is a trustworthy file from Microsoft. alcxwdm.sys seems to be a compressed file. Therefore the technical security rating is 20% dangerous, however also read the users reviews.

Recommended: Identify alcxwdm.sys related errors

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

it is for something about audio files
Avance AC'97 Audio Driver (WDM)
there is a conflict involving portcls.sys and alcxwdm.sys.

  thanh   (further information)
it has caused several errors on my system and i have always been refered to realtek. realtek! which one?
  S. Sturgeon  
it is an avance/realtek AC'97 audio driver. may or may not be "required", but it is a useful system driver if you do have it.
compatibility with windows xp
A process needed to get the Realtec '97 Audio device running, e.g. to get sound out of your computer. Not essential, but something you don't want to miss.
install the new drivers from Realtek: WDM_A400.exe
  Meaulnes Legler   (further information)
not working sound
  Magus   (further information)
driver of sound card
Audio drivers
all i know is that its missing in my PC and my audio is playing as if its fast forwarded
It causes random crashes on several of my mashines. Deleting it seems to help
I cant seem to install my sound realtek AC 97 it half installs then says can find ALCXWDM file exe can anyone please advice of what I should do
It is not dangerous at all and a part of the WDM audio driver package
  Bijan   (further information)
WDM-Driver for Realtek/Avance AC`97 onboard-chip, May cause serios BSODs.
its a problem causes blue screen and freezing
  mike greenfield  
AC97 Audio driver. don't delete harmful
c'est un logiciel de son
  modeste adou  
my sound driver not working with out this
sound driver for asus board

Rating chart

Summary: Average user rating of alcxwdm.sys: based on 51 votes with 24 user comments.
28 users think alcxwdm.sys is essential for Windows or an installed application. 14 users think it's probably harmless. 2 users think it's neither essential nor dangerous. 4 users suspect danger. 3 users think alcxwdm.sys is dangerous and recommend removing it. 6 users don't grade alcxwdm.sys ("not sure about it").

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Alcxwdm scanner

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Other processes

alcxwdm.sys [all]