Trouble Installing ADIsimRF

Hello!

This might be more of a problem with windows but I just can't find a way around it....

Whenever I run the "setup.exe" file to install ADIsimRF, the installation is cancelled and I receive this lovely message:

Has anyone else had the same problem and/or know anyway to resolve this?

I've downloaded and am using the rev 1.9 offline version of ADIsimRF but I would love to use the latest and greatest....