I have a problem when trying to open PDFs from a web page. I instantly get a message box saying -"The Adobe Acrobat/Reader that is running cannot be used to view PDF files in a web browser. Version 8 or 9 is required. Please exit and try again" But I'm pretty certain Version 9 is fully installed, and it seems to happily open PDFs attached to emails. I can also right click and use "Save Target As" to download the PDF and it then opens straightaway as a saved document. Any ideas please? Is something blocking the way it should work?