Android update failure

[Shuka]

 Android versioon(4.2.2 to 4.2.3) updates released for xperia m dual, but it is asking computer for update, even I'm connected to competer followed all the instrcutions also it is not updating, I have downloaded the updates 3 times but  failing to inject into mobile. This is a very big bug, evry time it is asking some stupid instrcutions to follow( which never work). I'm irritated for this. I realised that  made a mistake by buying this product. Here I'm attaching the screen shot.

[_alexdon_]

Did you try with SUS?

http://www.sonymobile.com/gb/tools/update-service/

[sam2]

connect ur device with usb debugging enabled that should work and check in control panel there is any driver problem