Toshiba satellite pro L300. I have installed Windows 7 on this old laptop and it updated and functions very well. I checked system information and found a problem device - ACPI\TOS1901\28DAB. No drivers are loaded. So I went to Device manager and found an unknown device listed in hidden items. Tried updating driver without success and now I wonder what it can be lurking in the depths of my laptop that isnt working. Any help would be appreciated, thanks. Ron.