Tiba-tiba hp mulai ulang terus menerus

Hp tiba-tiba mati dan hidup dengan mulai ulang, lalu mati lagi hidup lagi, seterusnya seperti itu.menurut teman itu rusak di perangkat lunak bagaimana cara mengatasi nya dan apa penyebabnya

Google translate:

Suddenly the cellphone started restarting continuously

The cellphone suddenly turns off and turns on by restarting, then turns off again and turns on again, so on like that. According to a friend, the software is broken, how do I solve it and what is the cause?