Hi EVERYBODY, Im new in here and i have a lil prob, I accidently change my driver of "Comp" in the Devices Manager to "Advanced Configuration and Power Interface (ACPI) PC" Which i suddenly found out that it makes my WINDOWS use only 1 core! When i tried to search for the old "Multiprocess ACP" i DIDNT found it! i had only "Standart PC" and the "Advanced Configuration and Power Interface (ACPI) PC" I tried to change to standart pc but it was even worse, right now i rolled back to the "Advanced Configuration and Power Interface (ACPI) PC"
What can i do?!
(Without formatting my comp >_>)Re-install your motherboard drivers...tried >_>Have you tried system restore?

Click Start ,Accessories,System TOOLS,Click System Restore,

Follow the instructions on the restore wizard, to restore to
an earlier date.
How are the settings in the BIOS ? ?
Have you read the MBoard MANUAL ? ?
What version of Windows are we talking about here ? ?System Restore didnt show me older date, only for today
and my bios settings i MultiProccessor i think, ill check out it later which MBoard Manual you're talking about?
and we're talking about WindowsXP