I experienced the same after completing the steps below the link as indicated in the question,
http://esupport.sony.com/US/perl/support-info.pl?info_id=878
But then I fixed it as follows:
You should see the Sony tablet in the Other Devices section of Device Manager .
Make sure adb is killed. (there is no "adb.exe" process in the task manager)
Double-click “Sony Tablet” in the device manager.
And follow the steps in the following windows.
- Click "Reinstall Driver"
- No, not this time → Next
- Set from a list or specific location → Next
- Click "Include this location in this search."
- Go to this path on your computer, Android SDK-windows \ Extras \ Google \ usb_driver
- Click "Next"
It will detect the “Android Composite ADB Interface” and the drivers will be installed.
At the command line, check adb devices , you should see the specified device.
source share