A system I built for my mom 4 months ago was running fine untill today. It has developed and issue where it will boot into windows and then run for about 30-60 seconds, then the fans rev max for literally half a second and it just instantly reboots. If I run the PC in safe mode, its fine. no issue at all. (I've let it go for 30 minutes no issue). I dont think its a hardware error/failure, but I cant for the life of me figure out how to fix this issue. any advice?