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Hot-plug CPU on Windows Server 2016

Problem: After adding CPU and RAM to a Windows 2016 Server instance, the instance doesn't recognize the added resources. Additionally, if the Windows 2016 server has 2GB or less RAM, hot-plugging CPU can cause the operating system to be sluggish and on rare occasions crash.

Cause: A bug in the Microsoft ACPI driver prevents hot-plug of CPU for Windows 2016.

Solution 1:

  • Reboot the instance and it will recognize the added resources

Solution 2:

  1. Uninstall the existing "HID Button over Interrupt" driver package for this device which will show up in device manager as not working properly.
  2. Download the PsTools from here.
  3. Unzip PsTools, and locate the folder of PsTools
    1. Open an elevated command prompt and navigate to the directory containing the PsTools (e.g., cd c:\users\admin\downloads\pstools)
    2. Enter this command: psexec -s -i regedit.exe
  4.  Open the registry by running regedit from the command prompt
    1. In the registry, navigate to HKLM\SYSTEM\DriverDataBase\DriverPackage\hidnterrupt.inf_x86<some instance ID>\Descriptors\ACPI
      1. Right-click on the ACPI0010 subkey and select Export. Export the file to a memorable location.
      2. Right click on the ACPI0010 subkey and select Delete, then confirm that you want to delete it.
    2. In the registry, navigate to HKLM\SYSTEM\DriverDataBase\DeviceIds\ACPI\ACPI0010
      1. Right click on the bidinterrupt.inf subkey and select Export. Export the file to a memorable location.
      2. Right click on the bidinterrupt.inf subkey and select Delete, then confirm that you want to delete it.
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