To close off this thread, it turned out that my IT department imaged the drive with the company software before they gave it to me. It appears that the software in the image, which I presume was designed for the T4x series, does not support dual cores. (Apparently something to do with the HAL.) Now ...

I have one of the original T60s with a 100 gb 5400 rpm drive. I find it very slow. Any suggestions for a new 100gb drive (probably 7200 rpm) that might speed things up?

Power consumption and noise, of course, are considerations but I am really looking for speed.

Thanks for the questions. I am running Windows XP (upgraded to SP2) with the original processor. There has been no hardware changes to this laptop.

Perplexing, isn't it? I think that I have a software problem somewhere.

I should have covered the BIOS in my original post: it is enabled for multi-core processing.

PC Doctor reports that the multicare is "misconfigured," but I am not sure exactly what that means. All of the other CPU tests passed.

Thanks for the responses. As I suspected, I do have a problem. To DAH, thanks for posting your CPU-Z screenshot. I do not see what you see. On my computer, CPU-Z shows only one core at the bottom of the screen, not two as in your screenshot. To Harryc, thanks for the PCWizard recommendation. It show...

My T60 (Model 2623D3U with a Core Duo T2500) shows only one core in CPU-Z. The BIOS (2.16) is the most recent one posted on the Lenovo support page and is enabled for a dual core. The hardware device manager shows two processors. The motherboard is rev. 3 If the T60 is operating properly--and it str...