How to turn off hardware acceleration from Chem3D outside if it crashes on startup after you enable the hardware acceleration?

1. Open your Registry Editor and browse to the following registry location

\HKEY_CURRENT_USER\SOFTWARE\PerkinElmerInformatics\Chem3D\21.0\Preference

To enable hardware acceleration the value needs to be changed to 1.  To leave hardware acceleration disabled, you will need to set the value to 0.

Note:  The path provided is for version 21.  For any other version, please change the folder name to the version you are working with.