Are you trying to or upgrade the software ? Which Windows version are you currently using?
Click on the located in the top-left corner of the user interface. Select Flashmode from the prompt box and click OK . Select your target firmware from the left-hand column.
Used heavily to deploy the Generic Swiss firmware updates. Sony Xperia Arc / Arc S Sony Xperia Neo / Neo V Sony Xperia Ray ⚙️ Step-by-Step Deployment Protocol