I have been using my Photoshop CS6 without a problem. However i have gone to use it today and i can open up any photos from bridge to Photoshop because its saying "COULD NOT COMPLETE YOUR REQUEST BECAUSE IT IS NOT A VALID PHOTOSHOP DOCUMENT". I have never had a problem before but the other day i did change some settins on my PC to help it run faster. Maybe this changed all the pictures to an unreadable. the are all saved as JPEG which i thought Photoshop could read. Can anyone help?