Have done a successful clean installation of Windows 7 Ultimate 64-bit on my ASUS notebook computer. It works perfectly.
Windows 7 contains the necessary drivers in itself. You don’t need to install the drivers. When the installation of Windows 7 is completed, use Windows Update to get the latest Win7 drivers.
Also, install the following Windows 7 drivers and utilities. Everything will work properly. Although they are for K50IN, they also can be used for your computer.
ATK ACPI Driver
ATK_MEDIA Utility
ATK_Hotkey Utility
ASUS ATKOSD2 Utility
ATK Generic Function Utility
ASUS Wireless Switch (Wireless Console3) Utility
ASUS Data Security Manager Utility (also for fingerprint logon)
Life Frame Utility
Power4 Gear Hybrid Utility
ASUS Splendid Video Enhancement Technology
Keyboard Device Filter Utility
http://support.asus.com/download/download.aspx?SLanguage=en-us&model=K50IN
Fingerprint driver and utility
http://support.asus.com/download/download.aspx?SLanguage=en-us&model=Fingerprint
Camera Driver (Follow instruction and get PID code first)
http://support.asus.com/download/download.aspx?SLanguage=en-us&model=Camera
Good luck!