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OS: Windows 8 x64 (with all important updates installed)

Symptom: On occasion or when Windows Update window is opened, svchost.exe (netsvcs) memory usage would soar to as high as ~2GB.

An answer to a related question Why/how is svchost.exe using 6.5GB of memory? suggests hotfixes [KB2847346] and [KB2950358], but they appear to be for Windows 7.

I tried to update the Microsoft Update client through [KB2887535] from which I downloaded Windows8-RT-KB2937636-x64, but it prompted "The update is not applicable to your computer." (Did this mean I already had the latest version of client?)

I tried to run "Windows Update Diagnostic" and it did find some problems and fixed as shown below, but the issue remains the same.

image identified

David
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Windows 8 (Build 9200) also suffers a high memory usage caused by Windows Update service. Because the issue is fixed with Windows 8.1, Microsoft suggests to update to Windows 8.1 to fix it.