How to Fix DAC X6 Audio Issues After January 2025 Windows 11 Update

If your FX Audio DAC X6 or similar USB audio device suddenly stopped working after installing the January 2025 Windows security updates, you’re not alone. Many users are reporting Code 10 errors and failed device startups, especially with the message:

“This device cannot start. (Code 10) – Insufficient system resources exist to complete the API.”

The culprit? Specific Windows updates that seem to break compatibility with USB DACs like:

• FX Audio DAC X6
• DAC Q4 USB Audio Device
• DSC X6 Series

Let’s go over the most effective solutions to restore your audio.

Problem: Windows Update Causing Code 10 Audio Error

Affected updates (depending on your Windows version) include:

• KB505059, KB504986, KB504981, and KB505021

So far, Microsoft and audio hardware manufacturers haven’t officially acknowledged the issue. That means rolling back the update is your best option for now.

Solution 1: Uninstall the Problematic Windows Update via Settings

Follow these steps to remove the offending update:

1. Click Start > open Settings.
2. Go to Windows Update > click Update History.
3. Scroll down and select Uninstall Updates.
4. Find the update from the list (refer to the update names above).
5. Click Uninstall, then confirm in the popup.

 Your PC may restart multiple times — this is normal.

Solution 2: Use Command Prompt to Uninstall the Update

If you prefer using the terminal or if Settings doesn’t work:

1. Press Windows + S, type CMD.
2. Right-click Command Prompt, choose Run as Administrator.
3. Copy and paste the appropriate uninstall command for your Windows version:

   wusa /uninstall /kb:505059
   

   (Replace the KB number as needed)

4. Press Enter and follow the prompts.

Solution 3: Restore Windows Using System Restore

If uninstalling doesn’t work or the option is unavailable:

1. Open Search > type Restore.
2. Select Create a Restore Point > then click System Restore.
3. Choose “Select a different restore point” > click Next.
4. Tick “Show more restore points”.
5. Select the restore point from before the update was installed.
6. Click Next > then Finish > confirm with Yes.

Your system will revert to a working state before the audio issue began.

Final Thoughts

Until Microsoft or the device manufacturers release a fix, your best bet to solve the DAC X6 Code 10 audio problem is to uninstall the January 2025 Windows update using Settings, Command Prompt, or System Restore.

If you’re using:

• FX Audio DAC X6
• DAC Q4 USB Audio Device
• Other USB DACs showing “Code 10”

…these methods should restore your device’s functionality.

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