Laptops using AMD Processors which is operating on Windows Xp please note you have to install the following:
AMD Processor Driver Version 1.3.2.0053 for Windows XP & Windows Server 2003 (x86 and x64)
Allows the system to automatically adjust the CPU speed, voltage and power combination to match the instantaneous user performance need. This package is a user friendly localized software installation of the driver designed for end-users. This driver supports AMD processors on Windows XP SP2 and Windows Server 2003 SP2 x86 and x64 Editions.
AMD Dual-Core Optimizer Version 1.1.4 (Mirror Download)
The AMD Dual-Core Optimizer can help improve some PC gaming video performance by compensating for those applications that bypass the Windows API for timing by directly using the RDTSC (Read Time Stamp Counter) instruction. Applications that rely on RDTSC do not benefit from the logic in the operating system to properly account for the affect of power management mechanisms on the rate at which a processor core's Time Stamp Counter (TSC) is incremented. The AMD Dual-Core Optimizer helps to correct the resulting video performance effects or other incorrect timing effects that these applications may experience on dual-core processor systems, by periodically adjusting the core time-stamp-counters, so that they are synchronized.
It is required to save power and reduce the thermal exhaust
The reason it is required is at the time of Windows Xp release these Drivers were not included
Windows Vista users just need to install AMD Dual-Core Optimizer Version 1.1.4
There has been some question if AMD Dual-Core Optimizer is really needed.
This is what I found out in the Readme.rtf in AMD Dual-Core Optimizer :
---Improvement and Fixes---Version 1.1.4* Fixed installation issue on Windows Vista.---System Requirements---
* Microprocessor: AMD Athlon™ 64 X2 Dual-Core Processors
This software installs and operates under the following operating systems* Microsoft® Windows® XP* Microsoft Windows Server 2003* Microsoft Windows Vista
The rationale is if it was not needed in Vista why would they fix it?