Flashtool-0.9.22.3-windows.rar -

Click at the bottom right. Flashtool will take a moment to prepare the files. Step 4: Connect Your Xperia in Flashmode

For Windows 10/11, you must disable driver signature enforcement temporarily:

: Flashing firmware typically wipes user data. Always perform a backup before proceeding. Flashtool-0.9.22.3-windows.rar

Use a tool like WinRAR or 7-Zip to extract Flashtool-0.9.22.3-windows.rar .

Unlock or relock your Xperia device's bootloader safely. Click at the bottom right

Select the firmware version from the left panel. Under the section on the right, check USERDATA and CACHE if you want a clean installation. 3. Connect the Device in Flashmode

Check the boxes for and Fastboot Drivers . (You may also select the specific driver for your Xperia model if listed). Always perform a backup before proceeding

A menu will appear. Check the boxes for and Fastboot Drivers .

Flashtool is a desktop application that communicates with Sony Xperia devices using S1 protocol flashing commands. It acts as an independent alternative to Sony’s official PC Companion software, giving users complete control over the software partition of their phones.