Hi,

I have a notebook which has a Centrino Duo CPU but Windows is only
recognising one othe cores. I think this is down to the fact that the
machine was imaged from a Single CPU Machine. Is there a way, without a
total re-install of Windows, which will allow me to "activate" dual
core? (getting Windows to actually know the CPU is there!). This is
Windows XP Pro.

The BIOS is already set to Dual Core aware but Windows doesn't know jack
about it at present.

TIA

"Clark Simpson" <(E-Mail Removed)> wrote in message
news:Xdpxh.215779$(E-Mail Removed)...
> Hi,
>
> I have a notebook which has a Centrino Duo CPU but Windows is only
> recognising one othe cores. I think this is down to the fact that the
> machine was imaged from a Single CPU Machine. Is there a way, without a
> total re-install of Windows, which will allow me to "activate" dual core?
> (getting Windows to actually know the CPU is there!). This is Windows XP
> Pro.
>
> The BIOS is already set to Dual Core aware but Windows doesn't know jack
> about it at present.
>
> TIA
>


The wrong HAL is being loaded because of the image. The easiest way to fix
it is with a repair install.

http://michaelstevenstech.com/XPrepairinstall.htm

--
Kerry Brown
Microsoft MVP - Shell/User
http://www.vistahelp.ca

Clark Simpson wrote:
> Hi,
>
> I have a notebook which has a Centrino Duo CPU but Windows is only
> recognising one othe cores. I think this is down to the fact that
> the machine was imaged from a Single CPU Machine. Is there a way,
> without a total re-install of Windows, which will allow me to
> "activate" dual core? (getting Windows to actually know the CPU is
> there!). This is Windows XP Pro.
>
> The BIOS is already set to Dual Core aware but Windows doesn't know
> jack about it at present.

Repair Installation *might* fix it up.
The problem is the HAL was not loaded for MultiProcessor systems.

How to Perform a Windows XP Repair Install
http://www.michaelstevenstech.com/XPrepairinstall.htm

How to perform an in-place upgrade (reinstallation) of Windows XP
http://support.microsoft.com/kb/315341

--
Shenan Stanley
MS-MVP
--
How To Ask Questions The Smart Way
http://www.catb.org/~esr/faqs/smart-questions.html

You may be able to switch the processor HAL manually:

http://support.microsoft.com/kb/309283/en-us

(Go to Device Manager, under Computer. My Core2 Duo system uses the ACPI
multiprocessor HAL.)

HTH.

Return address scrambled. Replace nkbob with bobkn.

"Clark Simpson" <(E-Mail Removed)> wrote in message
news:Xdpxh.215779$(E-Mail Removed)...
> Hi,
>
> I have a notebook which has a Centrino Duo CPU but Windows is only
> recognising one othe cores. I think this is down to the fact that the
> machine was imaged from a Single CPU Machine. Is there a way, without a
> total re-install of Windows, which will allow me to "activate" dual core?
> (getting Windows to actually know the CPU is there!). This is Windows XP
> Pro.
>
> The BIOS is already set to Dual Core aware but Windows doesn't know jack
> about it at present.
>
> TIA
>