Apple has released several updates related to Bootcamp, aiming to improve the use of Windows on Mac hardware:
iMac Late 2009 Windows 7 DriversThis download the contains the necessary drivers to implement Windows 7 on the iMac (21.5-inch, Late 2009) and iMac (27-inch, Late 2009) computers.
Graphics Firmware Update 1.0 (iMac and Mac Pro) compatibility with Windows 7Use Graphics Firmware Update 1.0 if you run Windows 7 using Boot Camp on your iMac (with NVIDIA GeForce 7300 or 7600 GT) or Mac Pro (with NVIDIA GeForce 7300 GT or Quadro FX 4500) computer.
Boot Camp Software Update 3.1 for Windows 32 bitThis update is highly recommended for all Boot Camp 3.0 users
Boot Camp Software Update 3.1 for Windows 64 bitThis update is
