Did you upgrade a Vista OS to Windows 7. If you ran the upgrade it would have moved all that cruff over from Vista including Registry keys and junk. It could affect Windows 7 performance.
The rule of thumb is clean install. And you can do that with upgrade media. See Link.
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.