If it came with your original system, then any restore that came with the computer should reinstall that program.
Now if you didn't have a back up or installation of the original system, and got it from somewhere else, there is nothing that we could do about that. In that case you would have to either contact the manufacturer about getting an original system installation CD/DVD/USB for your system, if it would come with the software (ask them first) and may well have a cost (for the installation media). Or you would have to purchase the software directly.