Satellite M50D - A - 10 L - pilot missing for unknown device

You just bought a Satellite M50D - A - 10 L and after 1 week, the HARD drive failed. Of course, I had to replace on my spending, because the guarantee would be in about 2 weeks, which was too long to wait for me.
In any case, I also lost the pre-installed Windows 8.1, but is not a tragedy, because I reinstalled it and everything works well.
The problem I have I have one of the pilots is not recognized by the "Device Manager". The device is called 'Device ACPI'. Any idea which driver missing is all about?
Thanks in advance for your answers.

PS: Do not know how to attach a screenshot of "Device Manager" with missing driver...

Have you tried to identify the unknown device, through the identification of the seller and device?

Tags: Toshiba

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