Hi Saltgrass,
Tough to describe this without screen captures but here goes.
My Apple iPhone is connect to my PC via the Apple adapter cord to a USB port.
In the past (since this photo downloading issue has come up) I haven't received the message of "do you trust this computer". Instead my photo downloading program, Nikon Transfer, opens up but it cannot be activated. It responds like the iPhone which opened it isn't connected.
To be sure the iPhone was working properly I went to Device Manager and double left clicked on Apple iPhone. I got this message: "This device is working properly." I then went to Apple iPhone Properties. Under the subheading of Events I found that the devise was installed on 10/31/16. The next event was on 12/20/16 which was to delete it. (I was probably trying to, get photos to download at this time and deleted the installation.) Then on 3/1/17 "device install requested." Nine seconds later the following is noted: "Device installed (wdpmtp.imf)" Beneath a box containing the previous information is another box with this message; "Device USB\VID_05AC&PID_12A8&MI__00\0 requires further installation"
Somewhere else I came up with this info:
Log: Microsoft-Windows-Kernel-PnP/Device Configuration
Source: Kernel PnP
Event ID: 410
Hope this makes some sense to you. Thanks for your help.
Dave