have you tried running in compatability mode?
i'm using a 550D and was using a 400D, which all use the same software, i'm on win 7 64bit.
What are you wanting the driver to do? control or download? if its download then get a cheap cflash reader and use it that way, it'll be a lot quicker as it'll be usb2 and not 1.1
canontechsupport came with the basic answer Go to menu on camera, second wrenh and go to communication change normal to TPT and EUREKA.
I wanted to download photos. It has been suggested that I use cardreader (though some had doubts) but cardreader not available for another 2 weeks. I am on the Westcoast of Africa.