How to extract/import photos from 'PhotoStream' in Windows 7 ?

Should it not be automatically pushed to your phone once you turned on photo stream on your icloud on the phone?

Open up Photostream on the phone, tap the little arrow to the right of the words "Photo Stream", tap on the photos you want and click Save down the bottom of the screen and then click Save to Camera Roll.

Photostream, when enabled, only makes sense if you use multiple device. If you have those other devices you can get your pictures from those. If you don't, you misunderstood the function of the photostream. It is not sync service. It's purpose to stream real time only, does not go backwards. If you did set up your pc with photostream correctly, your pictures are there already, inside of photostream folder in MY pictures, or pictures folder. If you didn't set up correctly - here are instructions for the future http://www.apple.com/icloud/setup/

Pictures folder. That is default folder for Windows 7. And it was not suggestion, more of explanation on what to expect. If you have previously set up icloud on your pc, you will find your photostream folder inside. But you didn't did you?

fromsouth is correct. It could also be a point if he hasn't set up Photostream correctly at all.