Right-click the desktop shortcut → . The first launch may download additional components (Xperia update engine). Allow it.
format. This is commonly used to upgrade to a newer Android version or to an older one if an update is buggy. Unlocking/Locking Bootloaders Flashtool-0.9.22.3-windows.rar -
Click Install. Windows may warn about unsigned drivers—choose “Install this driver software anyway”. Right-click the desktop shortcut →