Geez that's a PC meltdown.
In all seriousness disassemble your PC.
Remove the CPU and check for bubbling cracking or warping.
Do the exact same thing with your MOBO focus around and in the CPU socket and on the back behind the CPU socket.
also look for deformed swollen burnt/blackened components on your MOBO.
This is either a serious hardware failure or conflicting software. If it is the latter you may be lucky or you may have been hit with one of the old school Trojan Viruses that literally try to make your PC hardware cook itself by pegging the clock speeds on all hardware till the system fries. This latter is very unlikely but it isn't impossible.
Check your PSU take it out of the case and give it a good smell. If you smell that acrid scent of burnt electronics or the same smell you encounter around welders/metal workers also known as ozone. Burning metal gives off O3 and copper being the primary component in PSU will give a very noticeable odor.
Check all your internal cables from your PSU and reseat them if no damage is found also check the AC power cord itself you could find a well done rodent and obvious damage to the cord.
236C is hot enough to soften gold. Gold is the primary metal used in construction of CPU's if that temperature was actually reached I'm sorry to say but both the CPU and MOBO are scrap even your storage devices ram and GPU may have taken moderate to severe damage.
This could also be the result of a power surge caused by your local power grid a lightening strike or a faulty PSU.
Unless proven otherwise the PC may have been on an already overloaded interior home power circuit. This can also cause a major power surge.
