I have several drawings that were created in autocad 2010. However now I am using 2012, and the files will not open, and I get a message from autocad indicating that I need the DWG viewer to open the file. I downloaded the application, and installed it from the autocad website, but when I execute it, I get the attached error. Does anyone know if the view works with Win 7? Or a way to open and print my drawings?