High CPU usage in RDS 2022 - explorer.exe

Eric JOEL 21 Reputation points

Hi everyone,

We have an infra RDSH running on Windows Server 2022 DC. For the last three weeks, we have noticed a huge CPU usage for the explorer.exe process, and for any user and in a random way.

We have done several tests, and a user will only have chrome/bing open, with an Excel document => the explorer.exe immediately takes 18%.
On another user who had an edge open and an outlook online, his explorer.exe consumed 15% of the server CPU. We then closed everything, his session had nothing more open and despite that the explorer.exe continued to consume. We had to disconnect him completely.

And that in a random way: it can be the user A, the following day the user B etc.

It's getting really annoying, this problem appeared all of a sudden and there are no extra users on the server or applications installed.

Technical environment : RDSH servers, Windows Server 2022 DC, 21H2, build 20348.1249

Thanks ! :)

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Accepted answer
  1. John Brinker 81 Reputation points

    Check this thread: https://learn.microsoft.com/en-us/answers/questions/752491/server-2022-and-teams-bloats-hkey-local-machinesys.html

    Cleaning out those registry keys and disabling tablet input service did it for me.

    1 person found this answer helpful.

2 additional answers

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  1. 2022-11-29T13:58:21.317+00:00


    We have exactly the same issue, we are also on Win server 2022 DC.
    We thought it was RDCLIP at first but looks like the main problem is from explorer.exe.

    Like you the problem appeared all of a sudden.

    I hope we find the source !

    0 comments No comments

  2. Limitless Technology 44,101 Reputation points


    Thank you for posting your query.

    Kindly follow the steps provided below to resolve your issue.

    Press CTRL+ALT+DEL.

    Click Start Task Manager.

    On the Processes tab in Windows Task Manager, click the Explorer.exeprocess, and then click the End Process button two times.

    On the File menu, click New Tasks (Run), type explorer, and then click OK.

    Exit Windows Task Manager.

    Go to this link for your reference and other troubleshooting procedures https://support.microsoft.com/en-us/topic/high-cpu-usage-in-the-explorer-exe-process-when-you-open-a-folder-that-contains-corrupted-wav-files-in-windows-7-or-in-windows-server-2008-r2-e9a1429b-ad1e-f8a1-92be-dfaef52ccb03


    If the answer is helpful kindly click "Accept as Answer" and up vote it.