I found several links to make it fix but no luck. ( Sorry I still do not have permission to post those links.)
My OS is Windows Vista 32 bit home edition.
I installed PC companion and it is able to connect with the phone. But once I enable USB debugging mode, Windows shows "Found new hardware" dialog. When "Locate and install driver software" is selected it says software is successfully installed. But in the device manager it is shown under Other devices as 6602 with a exclamation.
It gives an empty list for "adb devices"
Is there anyone having a Xperia Z successfully connected with adb?