I'm guessing the first time my computer rebooted on it's own was two or three days ago. I say guessing because I didn't realize there was a problem. I thought I did it and didnt remember it was a busy day. Yesterday it happened again but I wasn't a 100% sure again. Tonight I am sure all three times it was booted into Kali Linux. My system is set up that it's not a dual boot I don't know what you call it. Windows 10 is on one drive Kali is on a completely diffrent drive. I read on here you couldn't put Windows and Kali on the same drive to dual boot because Windows did something or other so it will only dual boot with another Windows. I left my computer on last night logged into Kali when I woke up there was Windows asking for my pin. I left Windows on all day and it hasn't happened. All things being equal I'm guessing its Kali. I've researched the problem it wasn't hard there where almost no articles about this. Heres the rub all my hardware is new and I haven't installed any drivers in Kali for quite a while. I might be wrong but the only thing I could think of was heat, but if that's the issue when I'm using Hashcat in Windows and my GPU is running at 100 % it should do the same. Sometimes I leave it on all night running hashes and it's fine. I have no idea what it could be it honestly as far as I know it just decided to do this. If anyone thinks it's a Kali issue no big deal reinstall and forget about it. I'm worried its hardware my only solace is it's not doing it in Windows running flat out. If you have any ideas as to cause I would love to hear them. If I'm completely wrong please correct me. Hope to hear from someone soon. Thank you for your time.