1.    20 Aug 2017 #1
    Join Date : Aug 2017
    Posts : 2
    Windows 10

    100% disk usage and unable to open .msc, e.g services devicemanager

    Hi, Just need some help
    Basically i am unable to open any applications that end in .msc such as services or device manager, it comes up saying that i cant to open mmc.exe even though i am administrator, would really like some help and can specify more thoroughly if needed.
    And onto another issue i have is that my computer seems, to be running extremely slowly and always at 100%, i have tried stopping the services in task manager such as Wsearch and Superfetch but to no avail, without any programs running it still hits 100%, But it may dip if my computer has been running idle for about an hour, in which case it will be around 1% but after starting steam, google chrome most applications that require data from the HDD it shoots up to 80% upwards, and will take a long time to load anything. Any help would be useful
    Thanks Sam,
      My ComputerSystem Spec
  2.    20 Aug 2017 #2
    Join Date : Oct 2016
    Caledon, Ontario, Canada
    Posts : 4,027
    Windows 10 Pro Build 1703

    Hi Sam. Welcome to the TenForums @HensonVA

    I somehow doubt the two are tied together but you never know.

    First have you checked the health of your HDD? (CrystalDiskInfo, SeaTools)

    Is Chkdsk reporting any errors?

    Next have you run sfc /scannow and if so what were the results?

    Have you run a different virus scanner on "Full Scan" against HDD? (Malwarebytes, HitmanPro)

    The in place repair / upgrade will likely solve the .msc issue but it would be advantageous to know if some little guest has climbed aboard and that your disk health is reporting clean? For reference here is the tutorial. Please post back answers to questions. I'm sure other members will jump in with their ideas.

    Repair Install Windows 10 with an In-place Upgrade

    Along these lines, if you know exactly when this happened a System Restore may resolve the situation. The forum members also recommend Macrium Reflect to "Image" your system periodically. Free, reliable and a great way to get back to a working system.

    Backup and Restore with Macrium Reflect

      My ComputerSystem Spec
  3.    20 Aug 2017 #3
    Join Date : Aug 2017
    Posts : 2
    Windows 10
    Thread Starter

    I have done most of the above without any avail, and no reported issues, other than the sfc scan now, i have used multiple different usb anti virus's and i will let you know when i have completed the sfc scan
      My ComputerSystem Spec
  4.    20 Aug 2017 #4
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,452
    windows 10

    If you look in task manager and at the top sort the disk high to low what's using the disk?
      My ComputerSystem Spec


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