The regfile I post will make acrobat the default viewer for pdf files but in your browser adobe reader 8 will be used. The solution is to reset the file associations in the registry. setup created with adobe customization wizard and in installation options - default viewer for PDF files the option 'Make acrobat the default viewer if both acrobat and reader are installed' adobe reader 8 combined with adobe acrobat 7 (std or pro) and file association of pdf links to acrobat. Please exit Adobe Acrobat/Reader and try again.' when trying to open a pdf in IE browser. Resolution for error 'There is a problem with Adobe Acrobat/Reader.