software failure

[gmcb]

tried updating software and now, half way through it has crashed and says 'ENGINE FAILURE - ERROR 100'

my phone wont even switch back on now, ive tried the re-boot (holding down the volume up and power button) but nothing works??

can anyone help please?

[Thommo]

Try performing a system repair as this will often fix issues after an upgrade - This will factory reset your phone

Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)
Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the onscreen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process

If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP