To download the correct drivers for your , you need to use the official model name, which is the Canon imageCLASS LBP6230dn . While "F166 400" is the regulatory model number found on the back of the machine, Canon lists all software and support under the imageCLASS name. Driver Compatibility
The same driver package typically works across Windows 7 (32/64-bit), Windows 8/8.1, and Windows 10. Below is the process: canon f166 400 driver windows 7 8 10