@Rafeeq
Sorry for mistype of your name in previous post. Still looking for Event Viewer and found nothing related to uninstall from last contact time. Just a new installation which i made today.
@AravindKM
No there was nothing in neither start->programs nor Add/Remove programs. In SEPM it seems last contact was 14 March. I realized that even the computer is running and attached to network its status is offline and when checked client found no SEP software. That's why i am trying to understand how it has been uninstalled. The user is not admin and the client has password protect.