Hello Alexandros-P, I am sorry to hear that you are having problems with your processor, but let me help you.
The following link will provide you steps you can follow http://www.intel.com/support/processors/sb/CS-029426.htm?wapkw=(overheating)
Additional information could be found on this other URL: http://www.intel.com/support/processors/sb/CS-029427.htm?wapkw=(overheating)
My best recommendation at this point, is to update the BIOS using the file provided by the Computer Manufacture. We have received reports from other users saying that they were able to fix the problem by updating the BIOS.