How to transfer pictures from iPhone 4S to a Windows 7 computer?

So, I take very many pictures on my iPhone 4S, it takes up so much space, there's litterally 10, 000 pictures and a few videos on it. I also divide them into categories like 'trip' 'sister' 'brother' and such. I want to import the pictures on my pc in THE CATEGORIES THEY ARE ON THE PHONE so all the pictures are in the same categories as they are on my phone. How do I do that without dividing it manually?

Merry Xmas. If you mean the iPhone camera pictures, Connect your iPhone to computer through USB cable, and then open 'My computer', click on what should say 'Apple iPhone' (possibly have a picture of a camera next to it). And then go to folder 'Internal Storage -> DCIM -> 800AAAAA'. You should find all your pictures and videos that you recorded with your iPhone.
For Mac user, you can use iPhoto to transfer the camera pictures.

If you mean the photos that you sync from iTunes. You may refer to this step by step guide, it's about how to copy photos from iPhone/iPod back to computer. It's easy to understand and works pretty well for my iPhone.

http://www.ipod-transfer-copy.com/guides/copy-ipod-photos-to-computer.html

Hope it helps. Contact me if you have any other question.