Only one of my four cores on my i5-2500k is being used...

[SouthernGoods]

Hi i am Chris, i am somewhat new to computers and i'm having a bit of troubling with my CPU ,which is an i5-2500k, it is running but it isn't using all four of the cores. I verified this with CPUID, advanced boot options and the task manager graphs they all say my CPU has 1 core. Is there a way that i can unlock the other 3 cores?

Look at that core speed does that mean something is wrong... it's like twice the amount of average right?

 

[elemein]

Run>msconfig>Boot>Advanced Boot Options>Number of Processors>Uncheck the box.

 

[SouthernGoods]

Run>msconfig>Boot>Advanced Boot Options>Number of Processors>Uncheck the box.

I tired that but when i restart and go to the advanced boot up menu it re-checks itself.
And i did click apply and ok

 

[ihog]

Did you run it as an administrator?

 

[SouthernGoods]

O no i did not ill try again.

 

[SouthernGoods]

Lol i was being done i actually never was pushing the apply and ok
Thanks for the help everyone!