I have office 2007 installed on a win XP pc. I seem to be experiencing a very peculiar problem. When I try to open a file from the explorer window (a *.xls, *.xlsx, *.doc, or *.docx), it takes a very long time for the opening process to complete. But if I first start an application (word or excel) and then open a file from within the application menu, there is very little delay. How do I solve this problem? What settings can I change to fix this problem? I first thought that this was a problem only for office 2003 files and that time was needed for the conversion process. But this is not the problem as there is no delay when opening from the application. The problem is particularly acute when opening a file I receive as attachment.