Urgent Help Needed - System Not Working

I have a Macbook Pro with one of those crappy video cards that finally died. So I brought the laptop in to be repaired and they replaced the logic board in the computer. While the machine is finally working again, my Windows partition is not.

When I boot into Windows everything loads up fine except for the fact that nothing works. Neither the keyboard nor the mousepad produces any response from the computer. All I can do is reboot the machine by holding down the power button and then holding the option key to get back to my OSX partition. I'm in a bind and need this up and running asap so any help would be greatly appreciated.

 

i was finally able to reinstall the boot camp drivers and my trackpad is still not working. I have uninstalled and reinstalled the drivers several times but nothing is working.