surfing the web I found this driver is missing ST21 xperia android driver of usb debugging allows us to give our xperia root ST21
first of all this driver xperia down ST21 and decompress on the desktop for a better location
now we are beginning not the option we went in and we right click computer and go to properties and we dirijims wing device management tab and we appear a list of devices evice seek our option unknown secondary tab will appear android we click and we update driver and appear below the search driver software on your computer and you seek our folder and use the 64bit oh 32bist second is the version of your windows and Aque termien esperamso and intslacion process and ready we will have our dirver android adb ready to rotea :good:
first of all this driver xperia down ST21 and decompress on the desktop for a better location
now we are beginning not the option we went in and we right click computer and go to properties and we dirijims wing device management tab and we appear a list of devices evice seek our option unknown secondary tab will appear android we click and we update driver and appear below the search driver software on your computer and you seek our folder and use the 64bit oh 32bist second is the version of your windows and Aque termien esperamso and intslacion process and ready we will have our dirver android adb ready to rotea :good: