Acpi\tos620a

Don't worry. You haven't broken your computer. In fact, your computer is working exactly as it was designed to 15 years ago. The problem is that Microsoft and Toshiba have largely forgotten about the tiny component this driver controls.

If integrating into a WIM file:

Before you fix this, ask yourself: Do I actually want the screen dimming randomly?

Most Toshiba drivers use InstallShield or Inno Setup.