Some of my .jpg photos will not download to Premiere/Photoshop Elements 9 from computer (Windows 8), received error message: "...type file not supported or the required codes not installed." I downloaded files to my computer using Photoshop or Picasa 3. Thanks in advance for your help.
Welcome to the forum.
JPEG's should Import just fine, provided that they are in RGB Color Mode. CMYK, not that common in JPEG's, will not.
With Still Images, there are some things to consider: