I am working on my test mining rig which died on me the other day. At first it was rebooting at random, which can always be Windows updates. With Windows 10 your computer always seems to be updating (although you can turn most of that off).
But I started to see it more and more with time. And then it started to beep at times and not turn on.
I finally figured it must be the RAM so I changed it out and now the computer is running stable again.
I use this computer to try out new coins and mining software. Or to test out used cards I pick up along the way.