I'm on my phone using tapatalk so I can't see your PC specs.
Well first I would say that is a thermal issue. If it shuts down then you leave it alone for a few minutes then try to boot again it will make it further then if you reboot immediately after shutdown. If so it is for sure a thermal issue. Before I say check thermal paste we need to address the root cause.
Your cooling solution is either not good enough to cool the overclocker CPU or it is installed incorrectly. Like old or not enough thermal paste.
Your error regarding your oc is a sign of instability. We need to know what you OC settings are. You could have tried to reach a stable OC by cranking up core voltage leading to increase heat.
Run memory at stock settings until you get a stable CPU OC.
Check and provide info requested.