stuck at "google" load screen (GPE ROM)

hello everyone, i used the gpe port rom on my bell xzu everything was working fine until i updated "adaway" and it asked me to reboot. doing so leave me at the "google" logo

nothing is detected when plugged into computer
cant get into flashmode holding down & power

bootloader is locked.

blueether said:

Try these steps to get into flashmode so you can flash a FTF with flashtool:
Have flashtool setup and running with a c6833 FTF loaded and waiting for device

1. Connect ZU to PC
2. Hold the volume down key
3. While doing the above press the red reset button under in the SIM card flap

That should kick it into flash mode

Click to expand...

Click to collapse

thanks so much for the help blueether! so got into flashmode heres the log

02/006/2014 09:06:18 - INFO - Selected Bundle for Sony Xperia Z Ultra (C6806). FW release : 14.4.A.0.108. Customization : 1276-1569_R3C
02/006/2014 09:06:18 - INFO - Preparing files for flashing
02/007/2014 09:07:54 - INFO - Please connect your device into flashmode.
02/008/2014 09:08:06 - INFO - Device connected in flash mode
02/008/2014 09:08:07 - INFO - Opening device for R/W
02/008/2014 09:08:07 - INFO - Start Flashing
02/008/2014 09:08:07 - INFO - Processing loader.sin
02/008/2014 09:08:07 - INFO - Checking header
02/008/2014 09:08:07 - ERROR - Processing of loader.sin finished with errors.
02/008/2014 09:08:07 - INFO - Ending flash session
02/008/2014 09:08:07 - ERROR -
02/008/2014 09:08:07 - ERROR - Error flashing. Aborted
02/008/2014 09:08:07 - INFO - Device connected in flash mode

everytime idd plug it in windows would say installing new drivers then show SOMC flash device. i made sure flashtool was up to date and i reinstalled drivers will also attempt on sisters laptop to make sure it wasnt my pc but could it be anything else wrong?

EDIT: tried on my sisters laptop and everything worked out fine, thanks a lot blue