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HP Recommended
HP 17Z-ca000
Microsoft Windows 10 (64-bit)

New laptop ... initial startup operation WAS (Windows 10 64x ver 1809) good with both Realtek and HP Audio Control.fully operational and with Realtek HD Audio program listed in control panel.  Days later the auto upgrade to Win10  64x  ver 1903 caused loss of Realtek Audio Manager and hence HP Audio Control ceased functioning. Many attempts to reloaded drivers New and different older  (Realtek) drivers have met without success. In fact when installing legacy drivers from Realtek, I have had to do a complete restore to return any audio to this laptop. Does anyone know of the fix or the exact driver version(s) to use that may restore Realtek and then HP Audio Control ?  All I have succeeded in doing is delaying use  to restore laptop to a restore point prior to messing with. 

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