I have a user who is using XP Pro and when she recieves an email with a .pdf file attached it always wants to open it with Windows Picture and Fax viewer. I went to control panel and the files and folders application. When I went to the file tab I went down to the .pdf file and selected it. However the all of the buttons to change the setting from Windows Picture and Fax View to Adobe reader were grayed out. I am not applying these settings via group policy object. I gave here domain administrator rights and they are still greyed out. Any ideas why this is happening? Thanks!