[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.
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There was also the problem that users got older devices WLAN problems due to an outdated Qualcomm driver causing the loss of Wi-Fi connectivity.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 10.25.0.3 to 10.25.0.8) 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.