Then it could be that your USB cable is not a data cable.
Try this driver.
Since you "formatted" your laptop --- which is completely wrong way of describing what you didYou did a clean install of your laptop with Windows 7.I seriously doubt that you went in afterwards and re-installed all the drivers starting with the chipset driver..
I guess i have missed few drivers. So can i get some help about what should i do?
Can you elaborate on how should i use these drivers?
You install them!