This is where comes into play. As one of the most iconic and stable legacy versions of the Xperia flashing tool developed by Androxyde, version 0.9.13.0 remains a vital utility for servicing older, classic Sony Xperia devices. What is Flashtool 0.9.13.0?
Windows blocks unsigned third-party drivers by default. Because Flashtool 0.9.13.0 uses older Xperia drivers, you must disable this security feature temporarily: flashtool-0.9.13.0