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i7 2600K Recently Updated BIOS now Core 0 is 80% usage at idle

Hello,

I recently updated the BIOS on my P8P67-M ASUS board from 0805 to 3701, after this when my overall CPU usage is at 10% idle, Core 0 is at around 80% usage in Task Manager. This is in Windows 7 64bit. Overall performance has about halved due to this. Any idea what is causing this?

Thanks,

Nick
10 answers Last reply Best Answer
More about 2600k recently updated bios core usage idle
  1. Best answer
    Windows measures processor idle time as the fraction of all time spent running the system idle process. If it's at 80% usage, there's something in the background that's running. Take a look at task manager and find out what it is.
  2. Might also run Malwarebytes and a virus scan - might have a bug
  3. Tradesman1 said:
    Might also run Malwarebytes and a virus scan - might have a bug


    I ran Malwarebytes in safe mode and no objects were found. I did a Full Virus Scan and nothing was found. Even in safe mode my CPU 0 is being tasked very hard. I do not see anything in task manager that is using my CPU. Only 2 GB of my 16GB of memory are actually being used. Any idea what is causing this?
  4. Tradesman1 said:
    Might also run Malwarebytes and a virus scan - might have a bug


    I ran Malwarebytes in safe mode and no objects were found. I did a Full Virus Scan and nothing was found. Even in safe mode my CPU 0 is being tasked very hard. I do not see anything in task manager that is using my CPU. Only 2 GB of my 16GB of memory are actually being used. Any idea what is causing this?
  5. lucasni said:
    Tradesman1 said:
    Might also run Malwarebytes and a virus scan - might have a bug


    I ran Malwarebytes in safe mode and no objects were found. I did a Full Virus Scan and nothing was found. Even in safe mode my CPU 0 is being tasked very hard. I do not see anything in task manager that is using my CPU. Only 2 GB of my 16GB of memory are actually being used. Any idea what is causing this?



    If you see nothing at all then it's probably a driver. I suggest doing a full reinstall, it'll be faster than trying to figure out what's wrong.
  6. Reinstalled windows 7 64 ultimate. CPU 0 is still at 80% while nothing is running.
  7. Nothing in Task Manager under processes or applications appear to be doing much
  8. In this fresh install, almost no processes are running.
  9. lucasni said:
    Reinstalled windows 7 64 ultimate. CPU 0 is still at 80% while nothing is running.


    please post a screenshot showing it running at 80%
  10. After downgrading the BIOS a couple times, things appear to be back to normal. Thanks for the help.
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