1.    07 Feb 2017 #1
    Join Date : Feb 2017
    Posts : 1
    Windows 10

    ONLY showing using 1 core out of 4 core processor

    I don't know a lot about computer hardware or software problems. I run a Dell Inspiron 20 All In One PC. Model 3045. It is a 4 core computer. In the bios and Device Mgr. only shows operating on one core. There is only one item entry. AMD A4-5000 APU with Radeon TM) HD Graphics.

    A couple weeks ago PC acting weird - first, very slow. Odd messages: such as (not exact error message) Shutting down because of problem will restart. Adapter/Charger check. Bought new dell adapter and no difference

    Had my local computer guy check and he is the who told me about only operating on one out of four cores per the bios and device mgr. Called Dell and they ran a diagnostic and advised hardware no problem. Wouldn't address issue of why then does it show only one core operating. Next I called MS and they ran diagnostic and confirmed software ok. They cleaned it up and ran somewhat faster, but not like a new machine.

    Any direction you can offer would be appreciated. Dell is 2 1/2 years old.
      My ComputerSystem Spec
  2.    07 Feb 2017 #2
    Join Date : Feb 2016
    Maribor, Slovenia
    Posts : 8,984
    Windows 10 (Pro and Insider Pro)

    Hi barbslife and welcome to Ten forums.

    This CPUs aren't really fast, but should be OK for browsing and so..
    I've searched a bit, and found one similar problem, but no solution to it.

    Click on Start and type "msconfig" then click on program as it appears. Click on boot tab, then advanced and check if there are processors limited...

    Click image for larger version. 

Name:	image.png 
Views:	56 
Size:	23.1 KB 
ID:	120287
      My ComputerSystem Spec
  3.    07 Feb 2017 #3
    Join Date : May 2016
    Posts : 774
    Windows 10 Pro

    Open up task manager, select performance tab, select cpu.......then look at the bottom right of window. There you will find the info on your cpu......sockets, cores, logical processors and your cache. This is mine....a single processor with 4 cores that has hyper-threading which gives me 8 logical processors.

    Click image for larger version. 

Name:	cpu.PNG 
Views:	55 
Size:	33.8 KB 
ID:	120294
      My ComputerSystem Spec
  4.    07 Feb 2017 #4
    Join Date : Feb 2014
    Posts : 9,368
    Windows 10 Professional

    In Control Panel/Power Options, if you have settings at 'Balanced' or 'Power Saver', many cores will remain 'Parked' until needed, especially in Power Saver mode on Battery.
    Experiment with the power options and monitor the cores in Resource Monitor/CPU Tab.
    (In High Performance Mode, no cores 'park' themselves)

    Click image for larger version. 

Name:	000249.png 
Views:	51 
Size:	9.3 KB 
ID:	120311
      My ComputersSystem Spec
  5.    08 Feb 2017 #5
    Join Date : Nov 2016
    Posts : 441
    Windows 10

    On the Task Manager view as in post #3
    Right click on Graph and select > Change graph to > Logical processors.

    One core won't be your problem. More likely are Malware, lack of application/software maintenance, poor basic specs.
      My ComputerSystem Spec
  6.    08 Feb 2017 #6
    Join Date : Feb 2016
    Maribor, Slovenia
    Posts : 8,984
    Windows 10 (Pro and Insider Pro)

    Looks like you all missed in the first post from OP:

    In the bios and Device Mgr. only shows operating on one core. There is only one item entry. AMD A4-5000 APU with Radeon TM) HD Graphics.
    It means that only one core is recognized. Could be overheating and hardware failure or possibly option in BIOS.
      My ComputerSystem Spec
  7.    17 Apr 2017 #7

    Control Core Parking with ParkControl

    I have a quad-core CPU with Windows 10 that only displayed 2 cores and 4 processors with Task Manager.
    This remained the same no matter how many processors I entered in the BOOT Advanced Options of MSConfig.

    I did some research on the internet about showing less cores than your CPU actually contains and discovered ParkControl.

    I fixed the problem by installed ParkControl. ParkControl allows you to configure how many CPU cores are actually put in the parking mode by Windows. Now Task Manager displays 4 cores and 8 processors with MSConfig BOOT Advanced Options "number of processors" turned OFF.

    ParkControl Free Tweak CPU Core Parking and Frequency Scaling in Real-Time
      My ComputerSystem Spec


Similar Threads
Thread Forum
BSOD Enabling 2nd Core(Processor) in BIOS crashes Startup
Greetings Everyone, ;) My laptop suddenly shut down and sometimes showing Whea_Uncorrectable_Error(BSOD) on loading while logo shows up but when I disable the second core and set it to "always low" my laptop boots normally. I tried to...
BSOD Crashes and Debugging
Kaby Lake Intel Core processor 7th-gen CPU news, rumors & release date
Read more: Kaby Lake Intel Core processor: 7th-gen CPU news, rumors and release date | TechRadar
Windows 10 News
Intel® Core™2 Duo processor T6670
I am trying to Upgrade my Protege M750 with Intel® C™2 Duo processor T6670. The Upgrade starts but after while I got message Processor not supported. Any explanention why it is happened as even older processors are supported
Installation and Upgrade
Task Manager showing Intel Core i5-2500K operating at 5.29GHz??
Since I skipped Windows 8, I didn't get to use its new task manager. But now that I'm on 10, I'm heavily enjoying this AMAZING new task manager. However, I just noticed (not sure how I didn't see this before) that Task Manager is showing that...
Performance & Maintenance
Dual Core running at one core, No native resolution
I upgraded to Win 10 in late July, but lately realized maybe Microsoft might not be providing the updates to solve my current issues. My computer is pretty old, and the hardware is the same as it came out of the box, other than attaching a spare...
Drivers and Hardware
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 02:50.
Find Us
Twitter Facebook Google+ Ten Forums iOS App Ten Forums Android App

Windows 10 Forums