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I noticed that the System process has a high CPU usage (specifically, around 100% of 1 core). Following Troubleshoot High CPU usage by the "System" process, I opened the properties of System in Process Explorer and see that the ntoskrnl.exe!KeReleaseInStackQueuedSpinLock+0x1e0 is the one using most of the CPU. What could the issue should be?

I use Windows 7 SP1 x64 Ultimate.

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Franck Dernoncourt
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1 Answers1

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I disabled the Wi-Fi adapters, then rebooted the computer: it seems to have done the trick.

Specifically, in the Device Manager, I disable the 3 adapters:

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To disable them, I right-clicked on each of them, and chose Disable:

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I found out that the issue came from the Wi-Fi by killing processes one by one: killing them didn't affect how much CPU ntoskrnl.exe!KeReleaseInStackQueuedSpinLock+0x1e0 was using, except when I killed some processes related to the Wi-Fi (which caused ntoskrnl.exe!KeReleaseInStackQueuedSpinLock+0x1e0's CPU use shortly decrease, and then went back to "normal", i.e. eating ~100% of one core)

Franck Dernoncourt
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