When I turn the camera via USB cable - Windows is not found the camera because the driver is missing. :-(
see Picture here:
http:// answers.microsoft.com/en-us/windows/forum/windows_10-hardware/driver-missing-to-canon-eos-400d-windows-10/0b1db143-17d7-41fe-9b7d-33f10f8ca8e6
The drivers for this device are not installed. (Code 28)
There are no compatible drivers for this device.
To find a driver for this device, click Update Driver.
There is nothing help on Canon´s homepage. :-(
BR
Ulrik