On a Windows 7 Dell Laptop that is replacing an older XP system the end user needs to access various files from the different Microsoft Office applications, particularly Word and Excel. If the file is on her hard drive there is no problem opening it. If the file is an email attachment or from an Intranet site when she tries to open it the status bar scrolls across but then she gets an error telling her the file is corrupt. If she Chooses Save rather than Open she can open the file once it has been saved to her hard drive. The extra step takes time and is annoying. Any ideas as to what is causing this and what to do to fix the problem?