It seems as though, when attachments are sent thru microsoft word, or excel, people with pc's, are unable to open the attachment, at all. Some people can open the attachment if they save it to the desktop, and others cannot open it whatsoever. What could be the issue?.... It has only happened, since I reinstalled the system disc... The computer is only 1 year old, any thoughts, tips or advice for this mac rookie and his wife, who is 23 today?