Why cant my laptop keep restsrting

What OS is installed on it? It sounds like there is a corrupt driver or some file that could be corrupt that is causing it to crash before it fully boots. If it’s Windows based, I’d try system restore or maybe startup repair. If it’s Chrome OS, then create a recovery USB drive and reload the Chrome OS. Youll want to do some research as the key stroke to get Chrome OS into recovery mode is different for most models.