cannot connect to pc companion or usb charging via pc

[Tyas]

My phone keeps resetting and says failed updating and then shutdown.

now i want to connect to pc companion but it doesnt detect my phone can some1 help me?

[Uliwooly]

Charge your phone for 1 or 2 hours then try again, make sure to use a wall charger

[Tyas]

it was 98 precent before this happend

[Tyas]

it keeps rebooting and telling me software update failed make sure phone is connected to computer and try again

This is when its charging on a wall charger

[Uliwooly]

During the update process, the battery will drain quite fast. 

[Tyas]

but does the phone charge when it keeps rebooting and telling me the software update failed?

[Uliwooly]

Connect the phone to a wall charger > press and hold power & volume up for 10 seconds > let it charge for 1 hour 

[Tyas]

It keeps rebooting....

Do you have skype or something ?

Mine is

[Uliwooly]

If nothing works you will have to contact your local Xperia Care

http://support.sonymobile.com/global-en/contactUs/

[_alexdon_]

You may need to perform a software repair using PC companion.The process will erase all internal memory.You might need to charge your device for about 1-2 hours before so the device has at least 60% battery.

Make sure the device is not connected to computer or laptop and turned off (sometimes you have to press power button and volume up until the device vibrates 3 times or on some devices you have to press the small button near the SIM tray or on the back of the device).

Open PC companion->support zone->phone/tablet software update->repair my phone/tablet blue highlighted.Follow the steps given,do not connect your phone until prompted to press volume down while plugging USB cable. If PC companion does not start the repair process, you might need to run it in compatibility mode with Windows 7 (in some cases XP).