See if there's a option in the BIOS for the use of multi core?
Check in device manager for ACPI mutliprocessor, under Computer.
This does not answer your query directly but I guess it will help.
Intel hosts live chat event with their experts where people can discuss Intel products technologies. The next event will be held around their core processors. I think that it will be a good platform to ask this or any other questions. The next event is on 26th March at 9:30 am GMT. More info at
Try updating your motherboard BIOS.
If the problem continues try your processor on one of your friends computer and see where is the problem. If the problem continues on your friends computer then you need to call Intel to replace it 916-377-7000. If not then you need to replace your motherboard with the manufacturer.