I didn't know I could open a .pdf file that way! but tried it and it is still doing what it has been ever since I switched to the newer version of Adobe Reader/Adobe Acrobat: it starts to open the software and the opening picture for the software just stays there "forever". When I look at the task manager it shows the software is using from 85 to 98% of my cpu availability. I have a Sony Vaio with a 1,000 mhz Athlon chip. Would it have anything to do with antivirus software??