• ×
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
  • ×
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
Guidelines
Join the HP Community Solve‑a‑thon | Help Others & Share Your Solutions | Live on Zoom | 2:30 PM to 2:30 AM IST | Every Wednesday Click here to know more
Check out our WINDOWS 11 Support Center info about: OPTIMIZATION, KNOWN ISSUES, FAQs, VIDEOS AND MORE.

‎07-12-2026 11:37 AM

HP Recommended

I have the same issue on my HP Victus 15-fb0xxx with the MediaTek MT7921.

I updated everything to the latest HP versions (BIOS, Bluetooth driver 1.3.17.168, and Wi-Fi driver 3.0.1.1337), but the problem still comes back. Bluetooth works for a while, then the MediaTek Bluetooth Adapter shows Code 43, and sometimes it later changes to Unknown USB Device (VID_0000 & PID_0002). An EC reset temporarily restores it, but the issue eventually returns.

Have you found any permanent solution? If HP Support replies to you, please let me know. I'll do the same if I find a fix.

Reply
1 REPLY 1

‎07-14-2026 10:45 AM

HP Recommended

Hi @ryuukii,

Welcome to the HP Support Community.

Thank you for posting your query. I will be glad to help you.


The MediaTek MT7921 dropping into Code 43 and changing to an Unknown USB Device is a known hardware-level firmware crash. The most reliable permanent fix for the MediaTek MT7921 is to replace it with the Intel AX210 (non-vPro version). It is a cheap, drop-in replacement that takes 10 minutes to install and permanently solves Bluetooth and Wi-Fi stability.
 

To attempt one last software fix before replacing the card, try modifying the USB power management: 
 

  1. Open Device Manager, click View, and select Show hidden devices.
     
  2. Expand Universal Serial Bus controllers, right-click on the Unknown USB Device (or MediaTek USB port), and select Uninstall device. 
     
  3. Expand Bluetooth, right-click MediaTek Bluetooth Adapter, and select Uninstall device (check the box to attempt to remove the driver software if prompted).
     
  4. Right-click the top name of your computer in Device Manager and select Scan for hardware changes.
     
  5. Next, expand Network adapters, right-click MediaTek MT7921 Wi-Fi Adapter, and go to Properties.
     
  6. Switch to the Power Management tab and uncheck the box that says Allow the computer to turn off this device to save power.
     
  7. Shut down your PC completely, unplug the charger, hold the power button down for 45 seconds (hard reset), plug the charger back in, and turn it on. 
     

I hope this will help.

 

Take care and have a good day.

I'm an HP Employee.


If this reply helped resolve your issue, please select the Accept as Solution as it helps others in the community quickly find the answer they’re looking for.


And if you found this reply helpful, clicking Yes below is a great way to let us know we’re providing the support you need, as it encourages us to keep improving and sharing helpful guidance.

Reply
Was this reply helpful? Yes No
Warning
Be alert for scammers posting fake support phone numbers and/or email addresses on the community.
If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation.
Didn't find what you were looking for? Ask the community
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.