Playback device (Denon AVR) is not displayed in Windows?

My problem is that my Denon AVR X2500H does not appear in Windows 10 under the playback devices, although it has worked once before and I have not changed anything in terms of hardware (unplug the cable). I know there was a problem with the Windows October 2018 update regarding this:

After installing the "Windows 10 October 2018 Update" the sound output did not work for many users (see https://answers.microsoft.com/...8f9c3177e2 and https://www.reddit.com/...evice_is/). It sometimes showed the error that no audo device is installed.

Solution: Microsoft has released the https://support.microsoft.com/...-windows-u, which should solve the problem. Freely translated quote:

This update resolves the audio malfunction that could occur after the drivers for Intel Smart Sound Technology (version 09.21.00.3755) were installed through Windows Update or manually.

So, the update was automatically installed with me, but the receiver did not appear.
Then I updated my drivers with driver booster and behold it worked, the receiver was displayed and I could play music over it, the screen was also displayed - everything worked as it should;
I thought…
The next day I turned on my laptop and the receiver did not reappear
now,
what can it be and what can I change or adjust differently, since everything ever worked perfectly can it not be due to the hardware?

Did you insert the USB plug into the same USB port as yesterday? Certainly?

Who said something about usb? Of course, everything is connected via hdmi, no, I have not repackaged and even if I would have just the source undone, but does not explain why he is not angezeiegt among the playback devices simply nciht Although the laptop understands that over 1 hdmi 2 devices are shot. Does not change when I unplug the screen

Should you smell that? What would happen if you reverse the last Windoof update on a trial basis? If it works then you have a culprit…

By the way, are you looking

Windows 10 October update for more PC stopped
The update from Microsoft is not a good star. To avoid further problems, the update blockade has been extended to other devices. Delivery to devices with certain Intel drivers has been stopped. Because Intel has delivered a faulty display driver, which can lead to unexpected problems; it accidentally activates features not supported by the Microsoft operating system. This will prevent devices connected via HDMI, USB-C or DisplayPort from working. Now Intel has to remedy this, before the update is released for these devices again. Already excluded from the update are computers with AMD Radeon HD2000 and HD4000 graphics processors, VPN clients from F5 and users of the new Apple iCloud client.

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