How to fix error: This installation package could not be opened. Verify that the package exists and that you can access it, or contact the applikcation vendor to verify that this is a valid Windows Installer package."

ERROR: This installation package could not be opened. Verify that the package exists and that you can access it, or contact the applikcation vendor to verify that this is a valid Windows Installer package." I have tried everything which I found on google and apple community. Does anybody have the exact solution? PLEASE HELP!