I have been experiencing displaying any file with pdf format. Any site with a pdf which i want to look at does not come up. I see that adobe acrobat gets activated but after that it is only a blank screen. Due to recent security problems I have just recently installed the Zone alarm pro,F-Secure and Anti Trojan 5. The first 2 are always running in the background and I have the feeling that it's one of these doing it. Any ideas please?
Thank you for your great help.