I lost the cd for the printer can I down load it from the computer?

Download your driver from this link:
http://welcome.solutions.brother.com/BSC/public/us/us/en/model_top/colormfc/mfc240c_all.html?reg=us&c=us&lang=en&prod=mfc240c_all

You can download it from the Internet at the Brother website and then install it on your computer. However, I believe Windows 7 or Vista already has the drivers for most printers embedded in the operating system - you merely plug the device in and Windows will detect and load the drivers automatically. Sometimes, if it's not, make sure your computer is connected to the Internet and allow Windows to search for one online.