Donald responded that he can't open any files from Prof. Ed. I'd note that these are .pdf files. .pdf files can be opened only with the free and safe Adobe Acrobat Reader program.
You can download Adobe Acrobat Reader for free. They get their money by selling the programs that CREATE the .pdf files. Go to: http://adobe.com On the right side of the big grey box area, you'll see a button labeled "Get ADOBE READER." Click on it and follow the instructions. This is a widely used and safe program. Sometimes if people have an OLD version of Adobe Reader, they have trouble opening newer .pdf files. Make sure you have the current version. I'd note that this is also the place to get Adobe Flash Player on which more and more web animation and video is based. Apple seems to be having a feud with Adobe over Flash and I've seen articles that the issue is control. For all us disadvantaged Windows users, this is the place to get the current version of Adobe Flash. Ed
