How to configure the keyboard backlight to turn on whenever a key is pressed?

WARNING: There is a risk of data loss. This procedure involves editing the Registry. Using the Registry editor incorrectly can cause serious problems that may require the operating system to be reinstalled and can result in the potential loss of data. It is recommended to create a backup of the registry before proceeding.

1. Click the Start button and in the Search box, type: regedit 
2. Press the Enter key

   NOTE: If prompted for an administrator password or a User Account Control prompt is displayed, type the appropriate password, or click Yes.

3. In the Registry Editor window, in the left pane, navigate to the HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Sony Corporation\VAIO Event Service\Modules\{205A963F-2095-4040-8C37-15F91526660B} folder.
4. In the right pane, click to select Enable.
5. On the menu bar, click Edit and then click Modify.
6. In the Edit DWORD (32-bit) Value window, in the Value data: box, type: 0 and then click the OK button.
7. Close the Registry Editor window.
8. Restart the computer.