Last night,I finished my circuit diagram.But it's morning when i check it,I can't find all my arrows!I don't know what happend.I saved them,just one night they gone......it's important to me......I want to know what's the matter with my computer and how to fix it.Thanks everyone! [Forgive me English is poor.....actually,I'm a chinese but I see all the postes in English,so...I belive you can understand me~~thank you so much again!:)] ORZ