THE STUDENT PILOT LOST CONTROL AND THE AIRPLANE NOSED OVER WHILE LANDING ON A SOFT RUNWAY. STRONG, GUSTY WIND CONDITIONS EXISTED AT THE TIME. THE PILOT REPORTED HAVING A TOTAL OF 91 HOURS, WITH ONLY ONE HOUR WITH A CFI. HIS FAA MEDICAL CERTIFICATE HAD EXPIRED, AND HE HAD NOT BEEN APPROVED TO SOLO. THE AIRPLANE, OWNED BY THE PILOT, WAS OVERDUE FOR AN ANNUAL INSPECTION.