I'm hoping someone can help me with this. I haven't heard back from Adobe support. I'm trying to install the trial version of Premiere Pro CS4 and every time it gets to the point where it's installing Media Encoder, an installation error message pops up and says Premiere Pro and Encore could not install and gives me the option to continue or quit. If I look at the error message it says Adobe Media Encoder: 1603 fatal error. Not matter what I try I cannot get this to install. I've uninstalled virus protection. I'm running XP SP3 with plenty of drive space and RAM. this has happened on two different computers. I've got Creative Suite CS3 installed. Anyone have any ideas I can try?