Had the same problem with my XZ2Compact -- the device would work unter Win7 properly, would be available for
adb devices, but would not show up via
As I learned in Sergey's comment in the according thread:
"...phone presents different device identifiers to the computer in these modes..."
The Google USB driver would not work for me. But on Sony's drivers listing you'll find the Fastboot driver. It's a tiny
android_winusb.inf file (in fact, just a modified *.inf file that enables Fastboot support), copy it to the Google
...\usb_driver\ folder, replace the one in there.
Then, update the device's driver in Windows Device Manager as you did, picking the modified driver folder. You should be able to pick devices like Android ADB Interface or Android Bootloader Interface then.
As this driver combination isn't signed, Windows will warn you several times or ask for permission -- but as it's the files from the official Sony and Google site, you should still be fine. Worked for me!