Hello, I installed office home&student 2007 on win7. It works fine, except when I try to open a file (like *.doc or *.ppt)on windows explorer (library)by clicking twice, as always. Then I get the message "operating system not configured to execute this application". I translated the message to English the way it think it is. Besides, office DOES NOT appear in win7 list of default programs (| do not know how they are in English). Anybody helps?