Hey Everyone,
I wanted to tell all of you that I had the same problem with my Asus GL552VX, but I managed to solve it.
The blocker is mainly the Conexant audio driver, as there is no update yet in most of the laptots... but for Lenovo laptops.
What I did is download the Lenovo driver from here, Instead of installing it using the setup wizard, I selected the option "Extract only".
After extracting the package, I went to the device manager, selected Conexant SmartAudio HD, clicked on Properties and in the driver tab, I clicked in the update driver button.
In that wizard, you need to select to search the driver in your disk and later go to "choose from a list of drivers in my computer"...
Choose have disk (or use disk, I don't remember the exact english text), and go to the directory where you extracted the driver previously (within that directory you will need to navigate to WIN\AUDIO\20202908.1013083\x64), make sure to untick the show compatible
hardware option.
This driver might tell you that is not signed or validated for your device, you can ignore that warning and go forward.
This driver is updated with versions not affected by the bug that MS states in his page for 2004 update, so, if the driver works fine (in my case worked like a charm), this will unlock your computer for 2004 update.
If you have any issue with the audio, like it not working or something else, you can always return to the previous driver version through the device manager.
What you can do later if windows update still does not offer the update is go to
this page and download the MS update assistant, which will override Windows update.
This procedure worked perfectly for me and now I have Windows 10 2004 installed for a week now.
Hope this works for you guys as well...
Cheers