Numpy and Scipy installation on windows

I have installed Numpy successfully. But on the site , there is lot of things that I have to do such as building Numpy, Scipy, downloading ATLAS, LAPACK etc. I am really confused and even I have checked some of the other queries also. Still not able to understand.

Can anyone please explain me what exactly should I do? I have cygwin installed on my pc.

1. How to buid Numpy? whats the use of building numpy?
2. How to install Scipy?
3. Whats ATLAS, LAPACK etc etc ?

Thank you so much(in advance).

I struggled with the same problem for a long time, and I eventually found an easy solution here`