If you have ROG GameVisual installed, ASUS Splendid is removed as part of its' installation. ROG GameVisual has the problem with Windows 1903. Right now ROG GameVisual is difficult to uninstall. Run Msconfig.exe, Boot Tab, Safe Boot, Apply, then reboot. Once in Safe Boot, remove ROG GameVisual manually delete (Program Files (x86)/ASUS/ROG Gamevisual, then reboot. Run Msconfig.exe again, Boot Tab, untick Safe, apply. Use Revo Uninstaller to completely remove all registery entries of ROG Gamevisual.
Once that is all done, then ASUS Splendid can be installed normally.
G752VSK, G75VW-3D, G51J, G1S
Homebuilt Windows Server