In some cases, the generic Google USB driver can be "forced" to work with S1Boot devices by manually selecting it. Step 2: Disabling Driver Signature Enforcement
is the proprietary primary bootloader used by Sony Mobile Communications (formerly Sony Ericsson) on their Xperia line of smartphones. It is the very first piece of code that runs when you press the power button. Its job is to load the secondary bootloader (ABOOT) or Fastboot interface. s1boot fastboot driver
while connecting the USB cable), it presents itself to the system as "S1Boot Fastboot". In some cases, the generic Google USB driver
You plug the phone in while holding Volume Up, the LED turns blue for two seconds, then the phone reboots. Solution: Your phone is not properly entering Fastboot due to a hardware key conflict. Its job is to load the secondary bootloader