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Windows detects only one core

Anonymous
2017-11-16T15:37:30+00:00

Hello,

I've been using windows 10 since 2015 and it worked aces until now. Yesterday i installed the latest update and after rebooting i noticed that windows is using only one core of my CPU which is a core i7-4702hq. Device manager shows all the cpu cores, but in task manager only one is working. I looked the advanced boot option and it only shows one CPU core. I also reinstalled the CPU drivers but nothing changed

I restored the system to before the update but the problem persist.

Note: I use ubuntu in dual boot and i have no problem with it. Ubuntu detects all the CPU cores.

Hope you have a solution for me.

Thanks.

Moved from: Windows / Windows 10 / Devices & drivers

Windows for home | Windows 10 | Performance and system failures

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Neil D 33,330 Reputation points Volunteer Moderator
2017-11-17T17:02:14+00:00

You need to un-check Number of processors and while you're there un-check Maximum memory, then restart.

Can you post a screenshot of what you see in Task Manager. Select the performance tab and then CPU, by default it shows Overall utilization.

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  1. Neil D 33,330 Reputation points Volunteer Moderator
    2017-11-17T18:38:12+00:00

    Glad it fixed your problem. The image did not appear in your reply but not to worry if your issue is now fixed.

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  2. Anonymous
    2017-11-17T17:52:03+00:00

    Thank you this answer resoleved my problem

    Here is what the task manager gived me before if you want to see it

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  3. Anonymous
    2017-11-17T16:47:51+00:00

    Thank you for replying

    Here is what the advanced boot option gives me

    Note: i have the latest BIOS update

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  4. Anonymous
    2017-11-16T21:37:21+00:00

    Hi,

    The issue on the CPU cores of your PC could be due to software and hardware irregularities. Since the other operating system detects all the CPU cores on your computer, then try checking the system configuration utility of your PC. Just press the Windows key + R on the keyboard, type in msconfig on the Run dialog box, then hit Enter. Next, go to Boot tab, then Advanced options. The number of CPU cores should read 1 unchecked. If unchecking the CPU cores from the said option didn't make any changes, then try updating BIOS firmware.

    Let us know the outcome.

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