Windows 10 1903/1909: Audio, Bluetooth and WiFi issues fixed

[German]Another addendum to fixed issues in Windows 10 version 1903/1909, which led to upgrade blockades. Microsoft has fixed issues with some Realtek Bluetooth drivers, and unstable WiFi connections in Qualcomm drivers, and an audio driver bug has also been fixed.


When upgrading a Windows 10 system to the new version 1903 (May 2019 update) or version 1909 (November 2019 update), there may be several issues. Microsoft will then set an upgrade stopper for known problems. Microsoft maintains a list of known issues for Windows 10 (V1809 to 1909), which can be found here.  

Windows 10 V1903 Bekannte Probleme

Realtek Bluetooth driver issue fixed

Since May 2019 there have been problems with Bluetooth adapters from Realtek in Windows 10 Version 1903. Windows could no longer connect to the adapters. Microsoft blamed update KB4505057.

Unable to discover or connect to Bluetooth devices using some Realtek adapters

Microsoft has identified compatibility issues with some driver versions for Bluetooth radios made by Realtek. To safeguard your update experience, we have applied a compatibility hold on devices with affected driver versions for Realtek Bluetooth radios from being offered Windows 10, version 1903 or Windows Server, version 1903 until the driver has been updated.

The issue affected Windows 10 version 1903 and also version 1909, as well as the server variants. Microsoft states as of November 15, 2019 that this issue has been resolved with an updated driver for the affected Realtek Bluetooth adapter. The upgrade blocker for Windows 10 versions 1903 and 1909 has been removed.

Qualcom WiFi intermitted connection failures fixed

There was also the problem that users got older devices WLAN problems due to an outdated Qualcomm driver causing the loss of Wi-Fi connectivity. Affected were Windows 10 versions 1903 and 1909.


Microsoft states that this issue has been resolved with an updated Qualcomm Wifi driver. An updated Wi-Fi driver should be available from the device manufacturer (OEM). The upgrade blocker was removed on November 22, 2019.

Intel Audio intcdaud.sys Notification

Microsoft and Intel had already identified a problem with a number of Intel display audio device drivers in May 2019. This problem resulted in increased battery power consumption. Microsoft had stopped an upgrade for affected devices. Users attempting to upgrade to Windows 10, version 1903, received an intcdaud.sys notification if the affected Intel Audio Display device driver (intcdaud.sys, versions to was installed on the computer. The upgrade stopper also applied to Windows 10 version 1809..

Microsoft states that this issue was resolved as of November 12, 2019 with an updated Windows driver. The upgrade blockade has therefore been removed. If you still have upgrade problems, you should request a new driver from the OEM.

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Windows 10 V1903: Known Issues – Part 1
Windows 10 V1903: Known Issues – Part 2
Windows 10 V1909: Issues with Explorer

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9 Responses to Windows 10 1903/1909: Audio, Bluetooth and WiFi issues fixed

  1. Hal says:

    Nothing is fixed. Realtek audio problems are worse with 1909. At least with 1903 the Bluetooth audio was working. It is not recognising any audio device now. M$ has truly broken windows now.

  2. mio says:

    Microsoft is trying really hard silence the users on this issue. Here are the audio problems with Update 1903/1909:

    * DirectSound is broken, depending on hardware
    * ASIO (any version installed) gets broken
    * WASASPI is broken
    * Latency is high…and I mean REALLY high

    Anyone who does professional audio work would be jobless. These are serious issues. It's physically impossible to stream low-latency studio-quality sound from a machine in the "cloud". If Microsoft wants to sell only toy operating systems, that's fine. Just let us know so everyone can move to Linux and be done with it.

    • mio says:

      Now MS is trying to back-door an update, even though I have updates paused. It took down my DAW in the middle of work. Now it takes five minutes to load a PCM file.

  3. Atlis says:

    They have fixed shit. My Gigabyte GC-WB867D-I wlan adapter was working perfectly before 1903, now with 1909 it only crashes every 5 minutes.

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  5. Jeff says:

    My CSR Realtek Bluetooth Dongle wont even search for available devices after installing this update. Goes straight to couldn't connect.

    Fix yo shit Microsawft.

  6. milton magalhães says:

    Dispositivos de som que utilizam o drive Asio não pode mais trabalhar.

  7. purplejb says:

    since the 1909 update i ve had no sound from my laptop for over a month everything else works but no sound. so with the lockdown i cant use my laptop to communicate.
    have tried everything from using trouble shooters, changing realtek drivers, resetting all audio. constant updates from MS even contacting MS itself but no luck and no help. ive reset and updated everything and still no joy. prior to 1903/1909 updates never had an issue. If anyone has any ideas it would be greatly appreciated as i hate no being able to communicate.

  8. DK Mlotshwa says:

    I have been trying to link my Wireless-N WiFi Repeater and failing. It reflects on my computer but says, "unable to connect to this network. what should I do?

  9. Pingback: Ein Funktionsupdate ohne allzu viele Funktions-Updates – Clickomania

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