An electronic apparatus includes a central processing unit (CPU). The CPU includes a plurality of cores and restarting means. The plurality of cores includes at least a first core and a second core. The first core includes active monitoring means for actively monitoring an abnormality of the second core. The second core includes passive monitoring means for passively monitoring an abnormality of the first core. The restarting means restarts the CPU in response to detection of the abnormality of the first core or the second core by one of the active monitoring means and the passive monitoring means.