I bought a Dell Latitude D420 Core Duo 2 weeks ago. Our IT department installed the XP Pro for me to replace the XP Home. After install all the driveres, I only can see one CPU in the task manager. This is only one option in CPU history "One graph per CPU". In the Device manager, I can see two processors. Why can't I see two CPUs in task manager? Is there any way I can test two or one CPU are working in my laptop? BIOS v04, and enabled the multi-core function.

Another problem is that there is always an unknown device in the device manager list. Its location is "on Intel(R) 82801GBM (ICH7-M) LPC Interface Controller - 27B9" when reading its properties. All other info remains unknow. I tried installing all the drivers within the CD and from the web. The problem persists.