Laptop hard drive crashed, had to reinstall windows 7, but I lost my product key?

It's an invalid product key, my friend, because you've installed a version of Windows 7 that it's not compatible with. You need an OEM (Original Equipment Manufacturer) version for your particular brand of laptop. I.e.

If it's Sony brand laptop you need a Sony OEM Home Premium (64-bit) version of Windows 7. Right now your laptop is on a countdown. If you don't activate it within the trial period ... as that's what it sees your currently installed version of Windows 7 as ... it will lock you out.

You won't be able to use your computer ... at least, not legally.

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.