Any website to show how to replace windows?

I have 2 broken windows at 1st floor. They are single hung vinyl type. I like them to be replaced with Energy Star types.
I was able to remove the lower-half of the windows completely but the top one is not moving, I dont know if has to be pulled out along with the frame? Any website to show how u replace the windows? Or the broucer or user-guide that comes with the new windows are good enought?
Appreciate any help.
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