1 - Install the amd drivers, download it from here...
http://www.amd.com/us-en/Processors/Techni...71_9706,00.html

2 - read this website and download the hotfix....Download here http://www.microsoft.com/downloads/details...&displaylang=en

3 - Edit your registry to enable the HOTFIX, follow these steps.
1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Right-click HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Session Manager, point to New, and then click Key.
3. Type Throttle for the new key name.
4. Right-click Throttle, point to New, and then click DWORD Value.
5. Type PerfEnablePackageIdle for the value name.
6. Right-click PerfEnablePackageIdle, and then click Modify.
7. In the Edit DWORD Value box, type 1. In the Value data box, make sure that Hexadecimal is selected, and then click OK.
8. Quit Registry Editor.

4 - Make sure your BOOT.ini has this command in it, /usepmtimer to check, right click on My Computer go to properties, click on the ADVANCE tab, then under startup and recovery click on settings, then click on EDIT....

5 - Install the NEW AMD Dual Core Optimizer.......from here.....http://www.amd.com/us-en/Processors/...1_9706,00.html

Your Boot.ini should look something like this now..............

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Micro soft Windows XP Professional" /noexecute=optin /fastdetect /usepmtimer

Finally your done, if anyone has any questions feel free to PM me.

Ok, here is a simple way to reverse the drivers...........

1 - Uninstall the Hotfix, go into ad/remove programs, click on show updates and remove update numbered KB896256

2 - Reverse the registry entry.

3 - Uninstall the AMD drivers.

4 - Uninstall the AMD Dual Core Optimizer.

5 - Done.

But I install too.