I download Image from an Internet and want to open this jpeg Image in Photoshop but I got an error
Could not complete your request because of a problem parsing the JPEG Data.
when you look at the file in your windows (or mac) explorer, can you see an associated icon with the file? If it appears as a blank page there might be a possibility that the image extension was not appended to the end of the file name. I have had this difficulty with programs in the past.
If it is a "blank" page like the above icon (2014_C) you can try and rename the file and add ".jpg" at the end of the file. This won't necessarily fix it 100%...you may still have a bad download, but at least this is one way to try and make sure the file is associated with a program.
Non-associated files will open in some programs, but not always. Just a suggestion to look for.