Welcome to Apple Support Communities
The Windows support software is necessary to make Windows work correctly. Go back in Boot Camp Assistant, tick the option to download the Windows support software and follow the steps. Follow these steps to install Windows on your Mac > http://manuals.info.apple.com/MANUALS/1000/MA1636/en_US/boot_camp_install-setup_ 10.8.pdf
You can also download the Windows support software from the Apple site. Choose your Mac model in this website > http://support.apple.com/kb/HT5634?viewlocale=en_US&locale=en_US