Multiple-cored CPU`s not working on Windows?????

Is it true that none of Windows products, such as XP and Vista, can utilize both cores of a dual cored CPU? I mean my Lenovo 3000 is constantly showing it uses only 8% of the T5200 second core, even if i`m working with massive image rendering applications. So I guess it could mean buying such PC is a waste of money and battery time.

 

have you read this yet?
http://forum.notebookreview.com/showthread.php?t=60416

...over 500,000 genuine hits
(even beat Microsoft on a Google search about XP multi core)

FYI, XP SP3 and all Vista's fully utilize multi-cores

 

Maybe the application you're using does not utilize multiple cores.

Vista and XP can utilize multple cores like Gophn said.

 

This is a blast from the past, somehow in November 2006 when I got my AMD I came across the AMD optimiser in the first week and all has been fine ever since.

Gophn do you think if you didn't have the hotfix or the AMDO wPrime score would reflect or is that a bad way to confirm all working?

 

For most multi-core CPUs (except Core 2 Duo's) the XP hotfix or AMD optimizer has shown to improve multi-threading (using wPrime).

But I am doing final tests for XP SP2 and SP3 for confirming the registry entry usefulness.