I don't follow the problem.
They gave you a higher Edition of 7 - lucky you.
Why would the drivers be any different for Home premium or Pro?
I don't think whatever problem you are having is because you now have Pro as opposed to Premium.
Which drivers are still missing?The installer is mostly driver-complete, with newer arriving quickly via optional Windows Updates. Just in case, have your Wireless driver on flash stick or CD so you can get online quickly. Then enable hardware driver auto-updating and check for optional Updates frequently.
Any drivers still missing in Device Manager can be found on the Support Downloads webpage for your model computer or device. Driver Install - Device Manager