If you are going to be rooting your Transformer Prime, you will need to install these Windows drivers. For installation instructions, see How to Install Transformer Prime Drivers on Windows.
Category: ASUS Android Drivers
If you need 32-bit/64-bit Windows drivers for your ASUS EeePad Transformer Android tablet device, you can download the following zip file which will work for all Windows XP/Vista/7 systems:
Download ASUS EeePad Transformer Windows drivers here: ASUS_Android_USB_drivers_for_Windows.zip