I'm running a Window Vista machine with an HP7960 printer. I've had no problem in the past printing PDF's, but when I tried to the other day, I could no longer print them. The print progress box comes up, it starts with 0% and immediately jumps to 100% but nothing prints. The printer que shows no file or activity. I can print any other kind of file with no problem. I've tried PDFs I've made as well as from other people / sites, to no avail. I tried the "print as image" also, with no success. If I create a new PDF, it will print once, but then no more. The only change to my system I see is that I updated to Adobe Reader X a day or so before I noticed the problem. Is that my issue, or is there something else?? Any help is appreciated.