Based on Microsoft’s own Feedback Hub, there’s a bug inside Windows 11 causing the sudden high CPU usage and it’s slowing down the system. The Windows 11 22H2 which is coming in a couple of months is the possible fix for this issue. [caption id="attachment_316899" align="alignnone" width="720"] Windows 11[/caption] The culprit of this is the process called ‘sihost.exe’ or known as Shell Infrastructure Host. For those who don’t know what sihost.exe is, every Windows has this core component that supports the Start menu, taskbar, and other graphical elements inside the operating system. There are possible different reasons for the sudden high CPU usage caused by the Shell Infrastructure Host or sihost.exe and one of the possible reasons is Windows 11 itself. Good thing that Windows 11 now has new updates inside the Windows Insider Program which will fix this high CPU usage issue. The Windows 11 KB5016700 - is currently tested but it’ll be fully released with Windows 11 22H2 - resolves the bug that causes the issue. I've had the beta version of Windows 7 installed on my Intel Core 2 Quad, a Compaq Presario, and an Atom-based netbook for about a week now and so far, Microsoft's upcoming operating system gave a fairly good impression. Read more in our articles including "Incoming Windows 11 22H2 version possible fix for a bug that slows down PC" and "Windows 7 Preview: Less of the Same".
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May 1, 2026Based on Microsoft’s own Feedback Hub, there’s a bug inside Windows 11 causing the sudden high CPU usage and it’s slowing down the system. The Windows 11 22H2 which is coming in a couple of months is the possible fix for this issue.
[caption id="attachment_316899" align="alignnone" width="720"] Windows 11[/caption] The culprit of this is the process called ‘sihost.exe’ or known as Shell Infrastructure Host. For those who don’t know what sihost.exe is, every Windows has this core component that supports the Start menu, taskbar, and other graphical elements inside the operating system. There are possible different reasons for the sudden high CPU usage caused by the Shell Infrastructure Host or sihost.exe and one of the possible reasons is Windows 11 itself.
Our coverage of Windows slow includes: "Incoming Windows 11 22H2 version possible fix for a bug that slows down PC"; "Windows 7 Preview: Less of the Same"; "The 6 flavors of Windows 7". Each article provides unique insights and information.