Unable to switch on my phone need some serious help

[Tay1]

 everyone, i got some issues while switching on my phone. Today my phone has automatically downloaded system update, after completion i installed that update and few minutes after installation, phone restarted and shows this massage "The software update failed. Make sure that your phone is connected to computer and try again."

I connected my phone to the computer but still shows the same message and shuts down automatically and im not using any custom recovery.

what should i do now??? Please help me with that..

[Thommo]

Try performing a system repair using PC Companion as this will often fix issues - This will factory reset your phone and erase all data

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 on screen 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

[Tay1]

thanks for the help, but my phone is not switching on, so how come i turn off my phone and connect to PC through PC Companion?. I tried to connect my phone using PC Companion but it didn't connect. Phone turns on and shows "The software update failed. Make sure that your phone is connected to the computer and try again" and shuts back down.

[Thommo]

@Tay1 Your phone must be off and as per the instructions and using the repair mode you connect your device when prompted with your phone switch off holding volume down and then connecting your USB cable which enters your phone into Flashmode and begins the firmware re-installation process

[Tay1]

@Thommo thanks for the help. I followed every single instructions as you gave to me but it didn't worked. I also tried using recovery mode to enter flashmode for firmware re-installation but it didnt worked out. Results are same nothing happend. Is there anything else i can do?