Actually when you reinstall Windows 7 on a computer, via Custom Upgrade, it will leave the previous installation of Windows intact and unharmed. It will be renamed WINDOWS. Old after the reinstallation.
From there you can retrieve the old files. Just read the instructions carefully when reinstalling Windows 7 and you should be fine.
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.