If the database is using
the simple recovery model, there are no transaction log backups to
restore. You only need to restore the most recent full database
backup and if you were running differential database backups,
restore the most recent differential database backup.
Restoring a full SQL 2005 or later database backup
over an existing SQL 2005 or later database with active database
snapshots will eliminate all existing database snapshots for the
SQL 2005 or later database being restored.