CPU core missing

Hi guys!
I've recognized that my CPU is only using one core but it should have two cores. I'm using an AMD Athlon 64 X2 4600+ and i have windows7 if that count but if i remember well when i used xp that used only one core aswell.
How could i get the second core to work?
waiting for your answers, Thanks in advance.
3 answers Last reply
More about core missing
  1. Forgot to tell, my system shows that I'm using an AMD Athlon 64 4000+ 2.4GHz.
  2. only one core shown there :/
  3. Try a bios update and check your motherboard supports your CPU.
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