USB driver causes high CPU usage

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  • #32536
    Avatarishida
    Participant

    Windows 10 (build 19042.867)
    HP Envy x360 (13-ay0049au)
    NoMachine 7.3.2

    I have been annoyed by episodes of high CPU usage by the system that occur without any obvious trigger. It just starts randomly even when I am not using NoMachine. If I signed out of Windows and log back in, the problem is gone. This happens once every day.

    A quick look into Windows Performance Analyzer revealed that it has something to do with nxusbf.sys which seems to be a part of NoMachine (see the attached screenshot).

    Since I use NoMachine only as a client, I guess I do not really need nxusbf.sys, which seems to provide USB sharing of the server. If there is a way to completely uninstall nxusbf.sys, that would be nice. Any help is appreciated.

    Things I tried and did not work:
    I disabled NoMachine server and turned off USB-sharing on “Server settings” of NoMachine app.
    I uninstalled and re-installed NoMachine.
    I tried uninstalling and disabling NoMachine USB Host Adapter.

     

     

    #32545
    Avatarreza
    Moderator

    Please take a look at following article: https://www.nomachine.com/AR12O00955

    #32548
    Avatarishida
    Participant

    Dear reza,

    I was aware of the article, but I assumed that was written for older versions of NoMachine. I followed the steps outlined in the article, and voila, it seems the problem is gone.

    Thank you

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