: If the installation finishes but the driver still doesn't work, ensure you have disabled the "Digital Signature" check in Windows startup settings.
Once downloaded, go to , right-click the "S1Boot" entry, select "Update Driver," and point the wizard to the folder containing the .inf files. Sony PC Companion :
Select and "Fastboot Drivers" from the list. draiver dlia s1boot download skachat
Navigate to the folder where you installed Flashtool (usually C:\Flashtool\drivers ). Run Flashtool-drivers.exe .
If you are on Windows 10 or 11, you must disable Driver Signature Enforcement before running the installer, or the drivers will fail to register. : : If the installation finishes but the driver
You can find standalone S1Boot driver packages on developer forums like XDA Developers.
When a Sony device is powered off and connected to a PC while holding a specific key (usually Volume Down for Flashmode or Volume Up for Fastboot), it enters a maintenance state. The PC identifies this hardware as or "S1 Service" . Without the specific driver, the device will appear with a yellow exclamation mark in the Device Manager, and flashing software will fail to "see" the phone. How to Obtain and Install the Driver Via Flashtool (Recommended) : Navigate to the folder where you installed Flashtool
: If the device drops out of Flashmode after a few seconds, it is often due to a faulty USB cable or a USB 3.0 port incompatibility. Try a USB 2.0 port .