coltlau

Every time I download games in steam at like 50mb/s, my PC will somehow reboot over and over again. Idk the reason for a long time until recently, I find it might be caused by ESET. And then I uninstall it. This problem never happens again. But I do need protection for my PC. So, I need some help here. T_T Do you know what mechanism of ESET causes this? Is that possible you can tell me how to solve this? Thanks ahead.