Install Boot Loader in Sony Ericsson Xperia Neo. Download Android SDK amp; follow the tutorial on how to install Boot Loader in Sony Ericsson Xperia Neo.
http://coveringandroid.com/install-boot-loader-sony-ericsson-xperia-neo/
I was using Sony's PC Companion to try to update my Xperia S and kept getting that S1 Boot issue time and frustrating time again. I eventually went here ...
http://uk.answers.yahoo.com/question/index?qid=20120609051516AAnEIZo
S1 BOOT FASTBOOT DRIVER DOWNLOAD, BOOT Loading machine UNLOCK Instrument ... possesses held his offer to release the boot loader unlock device pertaining to Xperia Play, Arc ...
Mobile ... the net and this time we have its full product name to boot, the Xperia Neo.
http://www.engadget.com/2011/02/04/sony-ericsson-xperia-neo-named-and-previewed-in-one-fell-swoop/