error: A general unexpected critical error has occurred:
sun.security.validator.validatorException: PKIX path building failed:sun.security.provider.certpath.suncertpath.suncerpathbuiderException: unable to find valid certification path to requested target
see the console/logfile output for more detailed error information!
Maybe the reason is that what antivirus is installed that is blocking or the installation is going on a very old computer? It seems to me that everything should work as it should there just open the file and run it. Check again and show the screen.