Welcome Vigneshwaran K,
Thank you for posting on Microsoft Q&A. I'm sorry your Bluetooth headphones stopped playing sound after the Windows 11 version 26H2 update. That's frustrating, especially when they worked fine before.
To narrow this down, could you tell me:
- What brand and model are your headphones, and what brand and model is your PC (or its Bluetooth adapter)?
- When audio is playing, does the volume bar for the headphones move in Settings > System > Sound?
- Does the microphone or call audio work, even if music doesn't?
- Do other audio devices work normally, such as the built-in speakers, wired headphones or another Bluetooth device?
In the meantime, please try these steps:
Step 1: Check the output device
- Open Settings > System > Sound
- Under Output, select your headphones. If they appear twice (for example Headphones and Headset or Hands-Free), choose the Headphones (stereo) entry
- Click the headphones, check that the volume isn't at 0, and try Test
Step 2: Check the Bluetooth services and pair again
- Press Windows + R, type
services.msc, and press Enter - Find Bluetooth Support Service and Bluetooth Audio Gateway Service. Right-click each one and select Restart. If a service isn't running, set its Startup type to Automatic and click Start.
- Go to Settings > Bluetooth & devices > Devices. Click the three dots next to your headphones and select Remove device
- Restart your PC, put the headphones in pairing mode, and pair them again.
Step 4: Update or reinstall the Bluetooth and audio drivers
- Go to Settings > Windows Update > Advanced options > Optional updates > Driver updates, and install any Bluetooth or audio drivers listed there
- If that doesn't help, right-click Start > Device Manager and expand Bluetooth
- Right-click your Bluetooth adapter (for example Intel, Realtek or Qualcomm) and select Update driver > Search automatically for drivers
Looking forward to your update.