I have installed Windows 7 64bit on a users PC. With that I also installed Adobe Reader 9.0. Twice a day the user do phone me to tell me that he cant open his PDF files. I then re-associate a PDF file to ALWAYS open with Adobe.What happens is that ADOBE opens and a blank screen is shown. A blank message appears with the word DONE. A couple of hours further down the line he phones me again. I have uninstaled Adobe 9.0 and reinstalled it again without any changes. Please help.