CPU Processor

[TheMegatron54]

Hello,
I have Intel(R) Core(TM)2 Duo CPU E4500 @2.20GHz 2.20GHz
i have 2 processor
but, suddenly 1 of my processor is lost
as seen by me in Control Panel>System and Security>System>Device Manager
and in taks manager>Performance there should be two boxes of CPU Usage history but now there is only one

 

[kenny3105]

Go into your bios and on the Advanced tab>CPU Configuration option: Make sure that CPU Core Activation is set to auto or all cores. Then save and reboot.

If task manager still shows only 1 core then go into msconfig and on the BOOT tab click the Advanced Options button.

If the advanced options screen has a check in the box for Number of Processors then uncheck it. Save and reboot.

If this box is already unchecked then it may be that you originally installed windows with a single core processor and now need to reinstall