Download and install the USB Flash Driver and you'll be able to use Update Service to update your phone's software via the USB cable.
SharewareABC suggest you to use the most recent driver version.
Before install this driver we recommend to set a restore point. This way you can reverse system if the driver is wrong.
Sony Android Phone USB Driver 2.10.094
Sony Xperia T Jelly Bean ROM 9.1.A.0.420 Alpha
Sony Ericsson SA0101 ADB Interface Driver 126.96.36.199
Sony Ericsson Modem script for J300i
Sony Ericsson V800 / Vodafone 802SE USB driver
Sony Ericsson K600i PC Suite 2.0.60