I have an Xperia Z3 (D6603), and tried to connect at debug mode to my computer with Windows 7 Home Premium x64 and it doesn't recognize it, but without debug mode at device it does it; even the PC Companion doesn't recognize the Z3 device when is in debug mode.
I also downloaded the USB driver for the Z3 from (http://developer.sonymobile.com/downloads/drivers/xperia-z3-driver/) and tried to install from Device Administrator but doesn't recognize for the Z3. I installed the driver "manually" from System Symbol but when try install the Z3 still unrecognize it.
I also have an Xperia ZL, i activated the debug mode, plugged and it worked.
Please tell me what can i do to fix this, thank you very much.
Update 1: I tried install the downloaded driver without debug mode and it works, only happens with debug mode activated. I forgot mention that my device is encrypted, maybe can disturb with debug mode.
Update 2: I reinstalled the OS using PC Companion and formated the Micro SD, also tried without encrypt the system and doesn't work. Also i installed the drivers downloaded published at November 21, i used DPInst.exe.
I really need help with this issue, but Sony doesn't answer.
I let the problem some weeks, i worked with the ZL. But i don't have other machine for work, so i decided use a VM, and it works fine.
I suppose i have problems with some drivers at the host machine.
So, if you have my problem, use another machine :-), if can't, virtualize.