First my system hanged for longer time. When restarted out of many options I selected'' 4 Cores Unlocking'' which was at the bottom.?

Try removing or disconnecting all non-essential devices - hard drives, video cards, etc. and see if your PC will boot. Improperly seated RAM is also a common cause for a PC not booting. If there are multiple sticks of RAM try one at a time.

Also try removing and reinstalling the RAM sticks.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.