Vilket OS har du? XP Pro SP2 skall väl klara dual core?
Som
Wernborgdrloop redan påpekade, klarar t.om XP Home av dualcore.
http://searchwincomputing.techtarget.com/tip/0,289483,sid68_gci1189223,00.html:
"While Windows XP Home does not support more than one physical processor, there's a lot of confusion about whether or not it supports multiple processor cores in a single physical processor. This is implemented in several ways, of which the most widely used is Intel's Hyper-Threading technology. Also, AMD is currently rolling out a series of 64-bit processors called the X2 dual core series, which features two processor cores per die.
How much of this is supported? The answer is all of it -- in XP Professional, and, surprisingly enough, in XP Home as well. If you install XP Home on a system that has a single processor with dual cores or hyper-threading (what is referred to as two logical processors—XP Home will recognize both of them, and will install the appropriate Hardware Abstraction Layer (HAL) to work with it."