After reading some of your post , and trying them myself I'm unable to find the training files. I tried C:\Program Files\AutoCAD MEP 2010\Help, right clicked on CHM file, clicked properties, but could not find unblock. Due to being almost totally new to cad generally, I feel these training files will be beneficial to me, so I can progress with learning about cad and MEP. Can somebody advise me please on how to find the files, or post me a link to find them.
Don't know exactly what training files you are looking for, but here are some website links to help you learn. You can also access the program's help files by pressing the 'F1' key while in AutoCAD.
HTH ~ Mary
Try the second link in my first reply, it has the tutorial data sets. If I am remembering correctly, I never got the .chm tutorial documents to work, so I used the PDF version instead.