Hi, @MaryR333 

I generally draft a SR for VMware when I get a black screen.

Also, everyone is still installing the SVGA driver from VMware Tools and not using IDD (VMware Indirect Display Driver), which is why the event occurs, so I tentatively addressed it in the registry and it was cured.

I then uninstalled VMware Tools and installed the Horizon Agent, being careful not to install SVGA.

Now I am able to operate without the registry without any problems.