SONY s1 service 64 bit With All-rooms

Sony s1 Service With All-rooms

 Right, been trying to enter fastboot/bootloader. The phone is completely standard/locked at the moment.

I've press and held the volume Button while connecting the USB cable. I'm running Windows 7 64bit and have PC companion installed. Windows sees the device is plugged in, and attempts to install drivers - it fails. In device manager is shows S1 service without Drivers Installed

Free Link

I'm confused! I've got all the ADB stuff installed already and can successfully connect my HTC, so I assume it's just the Sony driver I need!

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I have been unable to unlock my bootloader because the driver cannot be found during install.

This has been a problem with a ZL and I realize this is a Z foum but since there is fa rmore people here...

Installing the Sony companion app installed

Zperia ZL
USB Mass Storage Device
SONY Mass Storage USE Device

I tried the procudure for bootloade runloc from the Sony Mobile site and it does installs the drivers but they all end flagged by Windows 7 and 8 as won't start.

Been doing this for 3 days and no luck.

Any help would be highly appreciated.

Thank you