I drag a file to Adobe Reader and get the following window "Adobe Reader could not open 'seventh council.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded)." It seems to do with every single file on my computer.
Can you open the file using the File->Open menu item?
Thanks for that quick response. I think I have finally cracked it by dint of trying everything on the menu.
If I go to file - export it transfers it into a PDF file which I hope to able to send as an email attachment.