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I've been experiencing high cpu usage from explorer.exe in Windows 10 Pro since a while ago, and this specific dll function seems to be the culprit. Any idea what it's for? I couldn't find anything about it.

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Stack:

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After loading symbols:

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hikari
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  • [Use Windows Performance Toolkit](https://superuser.com/a/1203562/174557) to see the cause. Expand the stack of the Explorer.exe instead of svchost.exe – magicandre1981 Dec 20 '17 at 15:03
  • tried that, couldn't find anything with the Ordinal247 function – hikari Dec 20 '17 at 16:46
  • Ordinal247 means you haven't loaded debug symbols. if you need help with reading the ETL file, share the etl (compressed as zip via OneDrive) – magicandre1981 Dec 21 '17 at 15:54
  • If I load the symbols in Process Explorer the name changes to _WrapperThreadProc – hikari Dec 21 '17 at 21:11
  • this doesn't help, it is only a snapshot you see. use WPRUI to capture the cpu usage. Until you do this I'm out of this topic. Without the important information/data I can't help you. – magicandre1981 Dec 22 '17 at 15:14
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    Is it just high CPU usage or is it doing any IO? Have had a similar prob in Win7 that I usually don't notice until it looking through my network disks. How much memory is it using? That was another characteristic of my prob. With lower memory, it fill memory; w/higher memory would usually take long enough to fill that I'd notice it; with 10G network card, it would create a network storm -- which sometimes required puling network cord to regain control. MS support eventually told me to upgrd to Win10 as fix. ;^/. Interesting. – Astara Jun 15 '19 at 06:48

2 Answers2

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As per CPU usage -> explorer.exe / shcore.dll!Ordinal247+0xc0 :

  • Under Control Panel -> Keyboard properties, the Cursor Blink Rate was set on "None";
  • After we changed it to somewhere in the middle -> problem is gone.

Screenshot of the Cursor Blink Rate Config

BsAxUbx5KoQDEpCAqSffwGy554PSah
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  • While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - [From Review](/review/late-answers/1125931) – Toto May 24 '22 at 20:52
  • @Toto The essential parts of the answer are already included here! It's not a link-only answer as you accused it of being. – BsAxUbx5KoQDEpCAqSffwGy554PSah May 25 '22 at 10:20
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Quoting the complete answer provided on CPU usage -> explorer.exe / shcore.dll!Ordinal247+0xc0 :

  • Under Control Panel -> Keyboard properties, the Cursor Blink Rate was set on "None";
  • After we changed it to somewhere in the middle -> problem is gone.
  • Screenshot of FIX
  • I don't know how/why, but this setting was problematic by us.
BsAxUbx5KoQDEpCAqSffwGy554PSah
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