Anybody have problem with this wizard?

Okay, on a href="http://www.equationwizard.com/" rel="nofollow"http://www.equationwizard.com//a there is a free download for an algebra equation solving calculator. I downloaded it and then tried to open it, but my computer said that it is an "executable file" and that it could contain viruses. What I am asking, is if anyone has downloaded this same equation wizard and whether or not they DID get a virus? Does anyone know anything about this website?