Problem Soved! for Sony camera with Vista
Sony DSC-S75 no usb driver for Vista - camera not recognised
The simple solution explained by Goats-2008 is below.
Turn your camera on (not plugged into the computer) turn the top dial to the Set Up position, on the back of the camera press the down arrow until you see USB CONNECT: Normal, highlight this then press the right arrow, you will see PTP and NORMAL.Highlight the PTP and press the center button of the direction arrows, it should now read USB CONNECT: PTP, turn the top dial back to the normal position and plug the camera into the computer, in a couple of minutes the computer will recognize the camera and in a few seconds a window will open that will let you import your pictures, they will go into Windows Photo Gallery. Thats all there is to it, I hope this helps.