Vostro 5460 and Inspiron 5488 Intel 7th gen processor Kaby Lake S System BIOS.

Do NOT power off the system until the process of updating(flashing) BIOS has been done.

BIOS Update Executable for Windows.

Download
1. Click Download File, to download the file.
2. When the File Download window appears, click Save to save the file to your hard drive.

Run the BIOS update utility from Windows environment
1. Browse to the location where you downloaded the file and double-click the new file.
2. Windows System will auto restart and update BIOS while system startup screen.
3. After BIOS update finished, system will auto reboot to take effect
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Note : Please make sure you suspend BitLocker encryption before updating BIOS on a BitLocker enabled system.
If you don't enable BitLocker on your system you can ignore it.