I recently upgraded to Microsoft Windows 10 and found that iTunes no longer detected my iPod Touch or iPhone. Here’s how I fixed it.
- Ensure the latest version of iTunes is installed.
- Open “Control Panel“.
- Select “Hardware and Sound“.
- Select “Devices and Printers“.
- Your iPhone or iPod should be displayed in the “Unspecified” section. Right-click it and select “Properties“.
Note: If you don’t see your device listed here, ensure you have selected to trust the PC on the device and you are using a supported cable. 
Select the “Hardware” tab, then click the “Properties” button.
From the “General” tab, select the “Change settings” button.
Select the “Driver” tab, then select “Update Driver“.
Choose “Browse my computer for driver software“.
Select “Browse…” then navigate to “C:\Program Files\Common Files\Apple\Mobile Device Support\Drivers“. If you don’t have this folder, check in “C:\Program Files (x86)\Common Files\Apple\Mobile Device Support\Drivers“.
Click “Next” > “Close“.
Your Apple device should now be detected successfully within iTunes.
FAQ
Why don’t I have the “Drivers” folder?
It is possible your installation of iTunes didn’t include it. Uninstall and reinstall iTunes and the folder should be re-created.
Thanks so much that worked! And easier instructions than on the Apple site itself.
happy for everyone…
any advice with someone with a Mac computer?
Dear sir.
Thank you very much for your help. In all the times I’ve sought online help yours was the most helpful and easiest to understand. Step by step process with images solved my problem imminently. . Outstanding!