Hi I was working with a customer onsite when I downloaded a trial of ESS Home Edition V4.0.417. When I double clicked the installer, an error message popped up. I didn't write it down, but it was something along the lines of "Unable to install application. Please contact the vendor to ensure this is a valid installation file." This is a fresh Windows install, fully patched and up to date. I was able to install Avast in the meantime, but the customer still wants ESS. Any ideas?