John's computer shuts down intermittently. Leo says he has a computer that does it and it's proven to be a flaw, and the company is replacing it. Leo says it's usually related to the power supply, or the computer is overheating. This can trigger a reset. The chat room says it can happen when watching YouTube as video playback is challenging. On the software side, he should make sure he has the latest video card drivers. But if that doesn't work, then he'll have to bring it in.