Dell Technologies Audio:Realtek ALC655 AC'97 AUDIO SYS alcwdm64.sys

How to Repair Alcwdm64.sys (Free File Download)

Last Updated: 12/12/2025
[Average Read Time: 4.5 minutes]

alcwdm64.sys is considered a type of Realtek AC'97 Audio Driver (WDM) file. It is most-commonly used in Windows (R) WDM driver for Realtek AC'97 Audio(HRTF data Copyright 1994 by MIT Media Lab) developed by Dell Technologies. It uses the SYS file extension and is considered a Win64 EXE (Driver) file.

alcwdm64.sys was initially released with Audio:Realtek ALC655 AC'97 AUDIO 5.10.0.6020 on 02/08/2006 for the Windows 10 Operating System. This is the most recent release date from Dell Technologies, according to our records.

Below, you find comprehensive file information, instructions for simple SYS file troubleshooting, and list of free alcwdm64.sys downloads for each available file version.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information ✻
File Name: alcwdm64.sys
File Extension: SYS file extension
Description: Realtek AC'97 Audio Driver (WDM)
Object File Type: Driver
File Operating System: Windows NT 32-bit
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Developer: Realtek Semiconductor Corp.
Software Program: Windows (R) WDM driver for Realtek AC'97 Audio(HRTF data Copyright 1994 by MIT Media Lab)
Legal Copyright: Copyright (c) Realtek Semiconductor Corp.1998-2005
File Details
Character Set: Unicode
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x334010
Code Size: 1400320
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What are alcwdm64.sys Error Messages?


alcwdm64.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with alcwdm64.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of alcwdm64.sys errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. Audio:Realtek ALC655 AC'97 AUDIO update) issues. Some of these errors include:

A problem has been detected and Windows has been shut down to prevent damage to your computer. The problem seems to be caused by the following file: alcwdm64.sys.

:( Your PC ran into a problem that it couldn't handle, and now needs to restart. You can search for the error online: [BSOD] (alcwdm64.sys).

<strong>STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (alcwdm64.sys)</strong><br /><strong>STOP 0×0000007A: KERNEL DATA INPAGE (alcwdm64.sys)</strong><br /><strong>STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (alcwdm64.sys)</strong><br /><strong>STOP 0x0000000A: IRQL NOT LESS EQUAL (alcwdm64.sys)</strong><br /><strong>STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (alcwdm64.sys)</strong><br /><strong>STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (alcwdm64.sys)</strong>

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter alcwdm64.sys BSOD errors after you've installed new hardware, software (Audio:Realtek ALC655 AC'97 AUDIO), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to alcwdm64.sys Blue Screen of Death errors. Therefore, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.


GEEK TIP : As a rule of thumb, it's always a good idea to create a Windows "Snapshot" backup / System Restore Point before making any hardware or software changes to your computer. That way, it's very easy to restore your system in the unfortunate event you encounter a alcwdm64.sys Blue Screen of Death error after recent changes.

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How to Fix alcwdm64.sys Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your alcwdm64.sys issue. These troubleshooting steps are listed in the recommended order of execution.


Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the alcwdm64.sys error, please proceed to the Step 2 below.

Step 2: If recently installed Audio:Realtek ALC655 AC'97 AUDIO (or related software), uninstall then try reinstalling Audio:Realtek ALC655 AC'97 AUDIO software.

You can uninstall Audio:Realtek ALC655 AC'97 AUDIO software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Audio:Realtek ALC655 AC'97 AUDIO 5.10.0.6020 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Audio:Realtek ALC655 AC'97 AUDIO software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Audio:Realtek ALC655 AC'97 AUDIO 5.10.0.6020

Dell Technologies

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many alcwdm64.sys error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the alcwdm64.sys error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your alcwdm64.sys File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate alcwdm64.sys file version. We maintain a comprehensive database of 100% malware-free alcwdm64.sys files for every applicable version of Audio:Realtek ALC655 AC'97 AUDIO. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download alcwdm64.sys Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Audio:Realtek ALC655 AC'97 AUDIO folder location:
    Windows 10: C:\Users\Tester\Downloads\R153492\WDM\
  4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve alcwdm64.sys problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download alcwdm64.sys Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying alcwdm64.sys to your appropriate Windows system directory. Dell Technologies typically does not release Audio:Realtek ALC655 AC'97 AUDIO SYS files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing alcwdm64.sys and all other SYS files for Audio:Realtek ALC655 AC'97 AUDIO. An incorrectly installed SYS file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10
Recommended Download (WinThruster): Optimize Your PC and Fix SYS File Association Errors.

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Files Related to alcwdm64.sys


SYS Files Related to alcwdm64.sys

File Name Description Software Program (Version) File Size (bytes) File Location
ALCXNT.SYS Kernel Mode Audio Driver Realtek AC97 NT40 Audio Driver (4.03.00.3040) 209656 C:\Windows\Prefetch\
alcxwdm.sys Realtek AC'97 Audio Driver (WDM) Windows (R) WDM driver for Realtek AC'97 Audio(HRTF data Copyright 1994 by MIT Media Lab) (5.10.00.6020) 3846016 C:\Windows\Prefetch\
alcwdm64.sys Realtek AC'97 Audio Driver (WDM) Windows (R) WDM driver for Realtek AC'97 Audio(HRTF data Copyright 1994 by MIT Media Lab) (5.10.00.6020) 3240960 C:\Windows\Prefetch\
Alswwtnt.sys SW WaveTable Synthesizer kernel driver Realtek Semiconductor Corp. Software WaveTable (DLS) (4.03.00.2002) 115168 C:\Windows\Prefetch\

Other Files Related to alcwdm64.sys

File Name Description Software Program (Version) File Size (bytes) File Location
ts_generic.PNF Precompiled INF Audio:Realtek ALC655 AC'97 AUDIO 5.10.0.6020 9068 C:\Windows\inf\
api-ms-win-core-profil... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 10600 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
api-ms-win-core-heap-l... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 11112 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
diagwrn.xml Extensible Markup Language Audio:Realtek ALC655 AC'97 AUDIO 5.10.0.6020 5718 C:\Windows\System32\Sysprep\Panther\
diagwrn.xml Extensible Markup Language Audio:Realtek ALC655 AC'97 AUDIO 5.10.0.6020 44683 C:\Windows\Panther\UnattendGC\


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