Select the "Unlock Bootloader" button. The tool will run a script, and your device will reboot automatically once finished. Potential Risks and Warnings
Go to Settings > Developer Options and turn on USB Debugging and OEM Unlocking [1]. Download Unlock Bootloader Vivo Fix Tool V2.0 Download Unlock Bootloader Vivo Fix Tool V2.0
Helps fix devices stuck in a boot loop or "System Destroyed" state after a failed flash. Select the "Unlock Bootloader" button
Click "Check Device" in the tool to confirm the connection. Download Unlock Bootloader Vivo Fix Tool V2.0
Note: The exact steps will vary by tool. This guide outlines a typical flow for many Vivo devices, often referenced in the context of a "Fix Tool."
Which does it use (Qualcomm Snapdragon or MediaTek)? What error message are you trying to fix?