CR 2013 - prompting1.html error

I've installed CR 2013 on a Win 7 PC. When I click OK on a parameter prompt screen to run a report, I keep getting this error:

Script Error

I've tried uninstalling and reinstalling several times. I am using the CR 2013 SP4 install image, with a full license. None of the other discussions mentioning "prompting1.html" have any definitive answers. Formatting the hard drive is not an acceptable answer.

Thanks.