RealTek audio driver on windows 10 1709 doesn't work anymore

When Microsoft does an update, this happens to me.  Here is a link that I have used every time and I get my sound back.  I use step 5.  My driver is an IDT

Instead of uninstalling a driver, use the Windows generic --- choose update, then browse, then let me pick,  then  first one that is generic.  It works.  see line below

https://www.drivereasy.com/knowledge/5-steps-to-fix-sound-audio-issues-on-windows-10/

I can still get sound when Windows updates with its generic driver but I lose the advanced sound functions that are available with the original Realtek driver package. 

Fortunately, I can work around this now by downloading direct from Realtek, installing the sound suite and then ignore the nags that there is an updated driver available.

I was able to resolve this issue by going to Apps & Features and removing the RealTek Driver. After rebooting the sound service would start correctly.

Try to disable Core isolation feature in security options. I had the same problem with my MSI GE70 after turning this function on. 

After I disabled it, everything is working.

It´s the 3rd of August 2018 and I have the same problem.

Dell Inspiron 13, W10 Ent. upgraded from Home (1709) to Ent. and next to the v.1803 3 weeks ago.

System sounds OK.

Blizzard Diablo III OK

Steam Spellforce III OK

Steam older games (DirectX) sound failed

Media player sound failed 

Groove sound failed (unknown format - MP3, error 0x80????)

VLC Failed (accidentally crash)

Realtek sound control failed.

Dell support recomended Factory recovery - a stupid little bit.

Microsoft God recomendations failed.

A lot of DCOM errors in Eventlog - Runtime broker - 9CA88EE3-ACB7-47c8-AFC4-AB702511C276 security settings not applicable.

IMO - There is a problem somewhere between Devices-system- HD audio and Devices-Sound, video...-Realtek HD audio drivers.

DCOM corrupted (during upgrade?), CDPserv, CDPUserServ - (APP W/O CLSID, APPID) , Unknown USERID in registry security settings ).

I tried:

1. I downloaded and installed all Dell updates, Windows update - No errors, but sound is not played (MP3, MP4, video, DirectX games) 
2. Tried to remove driver - restart - let Windows found driver itself. No result
3. Dell support contacted - ha ha ha
4. Microsoft support search - ha ha ha

One "good" solution recomended - FACTORY RESET! Ha ha ha ha ha ha. (8 E-mails, 3 Online services - 150GB data, Office and all custom settings, CRM SW, Database engine). Do you have aprox. two days of your time to spent useless? 

Problem is.... Windows and Microsoft.

I didn't try Alexanders suggestion and it is possible that it could work.

I will tell you that I tried buying brand new sound cards and installing and that didn't even work.

I dont see how you turn off core issolation because I am not running defender, I use other security software.