Is there a USB Windows 7 driver that outputs a voltage between Pin 1 and 4 of 5 V?
Just like a Charger. Others pins should be open/disconnected.
My notebook is a Lenovo X220.
Pin 1 is +5v. Pin 4 is the ground.
According to the user guide (page 8) for the X220, the USB port on the right side just below the Media Card slot is an Always On USB slot, so as long as there is power in the battery and/or the unit is plugged in, that USB slot will provide power to any device plugged into it... regardless of whether the laptop is on or not. That means it is operating system and driver independent.
That is the only USB port on that laptop which will provide an Always On connection.
What is confusing, is why you would feel the need to find drivers to supply power to a USB port that is always going to get power anyway. You see, the other USB ports will supply power to any device that is plugged into them if the laptop is turned on.
For example, if you were to purchase a USB desk fan or a USB desk lamp or even a USB powered heated travel mug and plug one of those devices into a working USB port, there are no drivers to install to get them to work. They will just work. Why? Because anything plugged into the USB port will get power (provided it is either an always on port, or the computer is on).
This also means if you plug your phone into a USB slot, and don't install any software, it should still charge... just as if you used that same exact cable with a wall AC/DC converter... just like the kind used for iPods and HTC phones, and Samsung phones, etc.
So, you need to explain yourself better... because if you took any standard USB cable, and cut the connections to pins 2 and 3, it becomes a USB cable that will only supply power.
Just so you know, I've built several USB LED desk lamps from scratch.... just because I had the stuff sitting around and the soldering iron was hot at the time.