I just upgraded (?) to the current version of Adobe. I am scanning documents from my HP MFP 521 scanner and all the pages are black/dark gray. No images are visable on any of the pages. Also, I have tried to open documents sent by clients and those are black, also. Previously, I was able to open and view those documents. I opened the same documents on another computer (with an older version of Adobe) and can view the docuemnts.