Bluetooth Speakers Not Working After KB4505903 Windows 10 Update

Microsoft says that Bluetooth audio system will cease connecting to gadgets operating Home windows 10, model 1903 after putting in the KB4505903 cumulative replace launched on July 26, 2019.

Apart from the Bluetooth audio system now not working correctly, customers may also discover a Microsoft Bluetooth A2dp Supply entry underneath the Sound, video and recreation controllers node displaying a yellow exclamation mark icon in System Supervisor.

This hints on the system being impacted by some problem associated to both lacking drivers or the motive force not being put in appropriately.

After KB4505903 is put in on a Home windows laptop with an inner speaker put in, customers will expertise one of many following points says Microsoft’s assist article:

• A Bluetooth speaker can’t hook up with the pc.
• A Bluetooth speaker can hook up with the pc. Nonetheless, the speaker output sounds noisy (dangerous high quality).
• A Bluetooth speaker can hook up with the pc. Nonetheless, the sound is generated by the inner speaker as a substitute of the Bluetooth system.

Workaround for Bluetooth speaker connectivity problem

Microsoft gives a workaround for fixing this downside which entails utilizing the System File Checker (SFC.exe) instrument to restore corrupted or lacking system recordsdata.

To do that, customers with affected techniques must observe these steps:

• Open the command console through the use of administrative authority.
• On the command immediate, kind the next command, after which press Enter: 
sfc /scannow
• Observe It might take a number of minutes for the command operation to be accomplished.
• After the method is completed, restart the pc.

Extra particulars on the way to use the System File Checker utility to repair system points can be found right here.

Earlier Home windows 10 v1903 Bluetooth points

This isn’t the primary time Microsoft prospects utilizing gadgets up to date to Home windows 10 model 1903 have skilled different points with Bluetooth.

In June, customers began experiencing Bluetooth pairing and connectivity points after making use of just lately launched cumulative, safety, or month-to-month rollup updates due to Redmond blocking some Bluetooth gadgets attributable to safety dangers.

“These safety updates handle a safety vulnerability by deliberately stopping connections from Home windows to unsecure Bluetooth gadgets,” stated Microsoft on the time. “Any system utilizing well-known keys to encrypt connections could also be affected, together with sure safety fobs.”

One month earlier, in Could, Microsoft stated that computer systems with Realtek or Qualcomm Bluetooth radios encountered points discovering and connecting to Bluetooth gadgets after putting in the Home windows 10 Could 2019 Replace due to outdated drivers.

This problem additionally prompted Microsoft so as to add a compatibility block added to cease customers from updating affected techniques to stop them from experiencing downgraded efficiency or usability issues.

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