Windows 10: how to fix error 633?

Discus and support how to fix error 633? in Windows 10 Gaming to solve the problem; I am trying to setup a dialup connection using an LSI Concorde C40 and NetZero services and I keep getting error 633, I've tried everything it... Discussion in 'Windows 10 Gaming' started by Spider01101, Mar 15, 2025 at 12:57 AM.

  1. SPIDER01101
    Spider01101 Win User

    how to fix error 633?


    I am trying to setup a dialup connection using an LSI Concorde C40 and NetZero services and I keep getting error 633, I've tried everything it suggested, and everything I could find in forums and the problem still persist.

    :)
     
    Spider01101, Mar 15, 2025 at 12:57 AM
    #1
  2. BORGUS
    borgus Win User

    Dial-up error 633 w/build 15063 Pro

    Dial up worked fine in 1607. With the update to Creators' build it now reports "error 633 - com port in use."

    The modem has always been on COM 3. Tried ports 5, 9, 11. Same. COM 1, the only port listed in Device Manager, is shown as "in use." Process Explorer shows no info when queried for "serial."

    Searched, read and tested virtually every suggested fix...

    Uninstalled and reinstalled dial-up connection
    Uninstalled modem (in Safe Mode), booted normally and updated modem driver
    Created a "reservedport" registry entry for port 1723
    Ran netstat -aon search for port 1723; it's not listed
    Disabled the broadband adapter temporarily and turned off the broadband modem temporarily

    SFC /scannow shows no errors.
    There are no VPN connections on this PC.
    This isn't a modem fault; MS FAX works fine.

    There was no DUN failure when 1511 O/S was updated to 1607. Yet, some months later, the 633 error appeared. An earlier 1607 image was restored and DUN was again functional.

    Applied Creators' update to that earlier 1607 restore and over a 1511 restore. DUN had been functional on them all until this update broke it. Have others had the same experience? Is there a fix?
     
    borgus, Mar 15, 2025 at 12:59 AM
    #2
  3. KHORSHED RANA
    Khorshed Rana Win User
    Error 633

    "Error 633: Modem already in use or not configured properly "

    After update to Windows 10 pro "Creator Update", I'm getting this error while connecting to internet with ZTE modem MF 710M. There was no problem before this creator update, how to fix it....Please.
     
    Khorshed Rana, Mar 15, 2025 at 12:59 AM
    #3
  4. MELKYPANDIANGAN
    melkypandiangan Win User

    how to fix error 633?

    my modem error 633

    my modem error 633 how i can fix this?
     
    melkypandiangan, Mar 15, 2025 at 12:59 AM
    #4
Thema:

how to fix error 633?

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