The Function Key Utility relies on:

Believe it or not, Windows 10 often has the driver, but it hides it under optional updates.

Toshiba (now Dynabook) never officially released a dedicated Windows 10 version for many older models, but the often works. You can find it on the Dynabook support site under your model’s legacy downloads.

Install this first and restart.

: Enable or disable the touchpad (Fn + F9) and keyboard backlighting (Fn + Z). System Controls

Here’s a ready-to-use post for a forum, blog, or tech support page:

This is the most significant hurdle for users today. In 2016, Toshiba sold its client computing business to Sharp. This entity eventually became . Consequently, the official support pages for older Toshiba Satellite, Portege, and Tecra models have been migrated, archived, or in some cases, removed entirely. Finding the specific Toshiba Function Key Utility for Windows 10 64-bit often leads to broken links or pages redirecting to Dynabook’s global site, which may not host drivers for legacy Toshiba models.