Fix CMUSBDAC.sys Blue Screen of Death on Windows 10

Do you keep getting the blue screen of death CMUSBDAC.sys in Windows 10? When this BSOD happens, the system reboots several times and you can’t do anything. Typically, this persistent error occurs when using a USB microphone, wireless phone charging cradle, while playing games, when loading updates, or when rebooting your computer.

CMUSBDAC.sys has a common destination for the termination code SYSTEM_THREAD_EXCEPTION_NOT_HANDLED. You suddenly see a message saying that your system has detected a problem and needs to be restarted, including the percentage scan status on the blue screen. Although there are currently no official fixes for the CMUSBDAC.sys blue screen, you can fix them by following the workarounds below.

Check for viruses and remove malware

If you have a virus or malware on your computer, you may also encounter cmusbdac.sys blue screen error. To solve this problem, you can scan your computer for viruses or malware and remove them.

Here’s a tutorial.

  • Press the Windows and I keys at the same time to open Settings. Then select “Update and Security” to continue.
  • In the pop-up window, click the Windows Defender tab.
  • Then click Open Windows Defender Security Center.
  • Then select Protect Against Viruses and Threats.
  • In the pop-up window, click Quick Scan to continue.

Windows Defender will then start scanning your computer. If there are viruses or malware on your computer, Windows Defender will fix it.

After that, restart your computer and see if the cmusbdac.sys error has disappeared. If this solution doesn’t work, try other solutions.

Resolve the problem driver

Sometimes it’s not the USB C-Media audio device class driver that causes the problem, but other hardware support software. It may be difficult to identify the specific culprit. Once you know, you can use the method in the second solution to update or reinstall that driver through Device Manager.

You can review the minidump file created by the BSOD event to isolate the problematic drivers. Although this is not always the case, it’s best to check:

  • Click the Windows Explorer icon on the taskbar.
  • Locate this computer in the left pane, right-click it, and select Properties.
  • In the left pane, click the Advanced System Settings link.
  • In the System Properties window, on the Advanced tab in the System Properties section, click Settings.
  • Select the “Log event to system log” and “Auto restart” checkboxes under “System errors”.
  • Open the “Write debugging information” drop-down menu and select “Small dump” (256 KB).
  • Press OK when finished.
  • After enabling the minidump, the next time your computer hangs due to a CMUSBDAC.sys problem or other Stop error, Windows will create a minidump that you can analyze to identify the problem driver or program.

Although minidump files are not easy to decrypt, you can analyze them with a tool like Windows Debugger (WinDbg).

  • Download and install the Windows Debugger tool and the corresponding icon pack for Windows 10.
  • When it appears in the results, type “WinDbg” (without quotes) in the Start window and click to launch it.
  • On the “File” tab, click “Icon File Path” and navigate to the location of the downloaded icon pack.
  • On the “File” tab, click “Open Crash Dump” and select the last minidump file from C: \ Windows \ Minidump.
  • Enter “analyze -v” (without the quotes) in the input field and press Enter to start analyzing the minidump.
  • Under MODULE_NAME “and” IMAGE_NAME “headers, find the culprit causing the BSOD problem.

Reinstall the USB C-Media audio class driver

To fix the cmusbdac.sys blue screen error, you can also reinstall the C-Media USB Audio Class driver.

Here is a tutorial.

  • Press the Windows and R keys simultaneously to open the Run dialog box. Then type devmgmt.msc in the box and click OK to continue.
  • In the pop-up window, expand Sound, Video, and Game Controllers.
  • Select the C-Media USB Audio Class driver and right-click it.
  • Select “Uninstall” to continue, and follow the instructions on the screen to remove it.
  • Then restart your computer and go to the manufacturer’s website to download and reinstall the C-Media USB Audio Class driver.
  • After completing all the steps, restart your computer and see if the system_thread_exeception_not_handled cmusbdac.sys file is fixed.

Restore your system to a restore point

If your system has been updated or if you have installed new programs on your computer, the new updates may not be compatible with your computer. A blue screen of CMUSBDAC.sys is displayed.

When you have new programs installed, simply uninstall them and see if they work.

After updating your system, try running a system restore to a restore point before you see the blue screen.

  • Click the “Start” button in the lower left corner of the screen and type “restore”. Then click Restore in the list of results.
  • Click “Open System Restore” to open the System Restore Wizard. (The following screen shots show the different “Open System Restore” locations in Windows 10 and Windows 7.)
  • Follow the System Restore Wizard to restore your system from a system restore point.

After restoring your system, restart your computer as usual and see if the blue screen error has disappeared.