I recently got a new computer that I use only for my different software. I do not allow the pc onto the internet so it does not get any viruses. I downloaded autocad, inventor, and revit on a computer that does use the internet. I saved the files onto a flash drive to transport to my other computer. When I downloaded everything I did not allow the program to run. When I brought the files over they wont run what can I do to install these onto my computer I have the serial numbers.