I installed the canon driver for windows7 x64 on my windows 8 pro and it actually worked, that I printed with it successfully.
What was done are
- Download the driver cp800w764 from canon site
- right click on the file and run the troubleshooter
- You get to a point were you specify that it worked with windows 7
- Apply the changes and run the driver.
- I did not plug the printer until the driver install specify that I should plug in my device.
Hope this help many that are yet to install the driver.