Unknown device on device manager- can't find driver- please help

I have a new Studio 1535 laptop and I reinstalled windows vista and all the drivers in their correct order but there is still an unknown device in the device manager that I can't find the driver for.

There is no description of which device it might be but in its properties it says that the device is located on the Intel(R) ICH8M LPC Interface Controller - 2815.

I have tried all means to identify what it is but I can't.

The driver disk that came with the laptop doesn't seem to have any driver that corresponds to the unknown device.

Can anyone please help me to identify the device and which driver I need to install or am missing and where to get it?

I have not added any new devices to the laptop since getting it.

I only did a clean install of the operating system.

I thought that the driver disk was supposed to contain all of the necessary drivers to reinstall the devices that came with the computer.

Thanks a lot for any help.