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Asked: 2026-06-18T23:46:19+00:00

I’m trying to get the current processor speeds/throttlings through CallNtPowerInformation() with the ProcessorInformation input:

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I’m trying to get the current processor speeds/throttlings through CallNtPowerInformation() with the ProcessorInformation input:

SYSTEM_INFO systemInfo;
GetSystemInfo( &systemInfo );

numProcessors = (unsigned char)systemInfo.dwNumberOfProcessors;
powerInformations = new PROCESSOR_POWER_INFORMATION[numProcessors];
long status = CallNtPowerInformation( ProcessorInformation, NULL, 0, powerInformations, numProcessors*sizeof(PROCESSOR_POWER_INFORMATION) );

Unfortunately, status is always equal to STATUS_ACCESS_DENIED. I can’t find any documentation on why this would be, can anyone point me to some reasons why I would not be able to get the current processor information?

This is running on Windows 8, on a Surface Pro (using Desktop APIs), and I’ve tried starting VS2012 with elevated permissions to no effect.

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1 Answer

  1. Editorial Team

    It turns out that if I run this code in a Console application, it works, but if I run it inside of a Metro application, it fails. I will ask a new question on how to execute code like this inside of a windows store app.

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