Windows 10: COM ports always "in use" in Windows 10 64bit

Discus and support COM ports always "in use" in Windows 10 64bit in Windows 10 Drivers and Hardware to solve the problem; I have two programs that make use of the serial ports on my Windows 10 64bit machine. It is running build 19041.508. This PC has a serial port on the... Discussion in 'Windows 10 Drivers and Hardware' started by Calab, Sep 22, 2020.

  1. Calab Win User

    COM ports always "in use" in Windows 10 64bit


    I have two programs that make use of the serial ports on my Windows 10 64bit machine. It is running build 19041.508.

    This PC has a serial port on the mainboard, two more serial ports on a PCIe expansion card, and a COM port provided by a USB adapter.

    One program, known as "RespeQT", is using the USB adapter to connect to an old Atari system on COM5. About 75% of the time, when I try to make a connection, I am told that "access is denied" and the connection does not work. Sometimes the connection does work.

    The other program, known as "ADTPro" is a java program. This program ALWAYS tells me that the port "is in use", regardless of which of the 5 COM ports I select.

    No other software should be using the COM ports. I even used Process Explorer to try and identify if the PCIESA64 (for the expansion card) service was running, which it was not.

    Why won't Windows allow the serial ports to be selected and used?

    :)
     
    Calab, Sep 22, 2020
    #1
  2. Ahhzz Win User

    Windows 10 Tweaks

    Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

    Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

    • Open a new Explorer window.
    • Click View in the ribbon.
    • Click Options.
    • Under General, next to “Open File Explorer to:” choose “This PC.”
    • Click OK


    credit to Lifehacker.
     
    Ahhzz, Sep 22, 2020
    #2
  3. Windows 10 lost COM ports

    Hi John,

    The issue that you’ve encountered regarding the missing ports on your Windows 10 computer may be caused by some configuration or files mismatched. To sort out your concern, we’d like to know the following information:

    • What are the troubleshooting steps you've done so far?
    • Which devices are using the COM port on your computer?

    Additionally, we suggest that you follow the steps provided in this article on how to perform the
    Advanced startup options (including safe mode).
    Once you’re on the page, you may proceed with the steps and complete the process. After completing the steps, you may check if you’re able to install the port on your PC properly.

    We’re looking forward to your response.
     
    Joseph Ban, Sep 22, 2020
    #3
  4. Nordic Win User

    COM ports always "in use" in Windows 10 64bit

    Windows 10 upgrade problem, no input accepted

    I really hate having to come here and ask for help, but I really am stumped. It hurts my geek pride. I have a PC with fairly modern hardware in it. It has a p8p67 pro in it. I have tried upgrading windows 10 on it twice now. Both times I have had the same result.

    After windows finishes upgrading it goes to the log in/set up screen. I can't do anything. No keyboard or mouse input is accepted.

    I will list some, or hopefully all, of the troubleshooting steps I have tried:
    • Move keyboard and mouse to different USB ports.
    • Try different keyboard or mouse.
    • Restart computer, repeatedly.
    • Google for related issues.
    • Update Bios, because why not.
    • Create boot media and revert to windows 7.
    The windows 10 system restore boot media works fine with keyboard and mouse. All USB ports work in windows 7. I don't know what is wrong. I suspect that windows 10 is lacking a driver of some sort, but since the computer accepts no input I have no way of checking for which driver let alone installing it.

    Please help me figure this out. If I have to revert back to windows 7 again, I am not going to get it upgraded to windows 10. Thank you in advanced.
     
    Nordic, Sep 22, 2020
    #4
Thema:

COM ports always "in use" in Windows 10 64bit

Loading...
  1. COM ports always "in use" in Windows 10 64bit - Similar Threads - COM ports always

  2. Com Port

    in Windows 10 Drivers and Hardware
    Com Port: i have a bluetooth device that i need to re-assign the Com Port. there is some software that i am using that only identifies Com1, Com2, or Com3 and this device is currently assigned to Com5. Is there a way i can reassign the Com Port. I have an HP Omen and am using...
  3. Com Port

    in Windows 10 Drivers and Hardware
    Com Port: My Com 3 Port was working fine and I now plugged in a device and I see 2- Com 2 ports and 1- Com 2 port, none of which are connecting to my device? How can I reinstall the Com 3 port driver if I delete the current one can I still download it>...
  4. Com Ports

    in Windows 10 Drivers and Hardware
    Com Ports: I have Windows 10 and am having a problem my com ports do not seem to work, Com1 has a yellow shield and the prop tells me driver not available. I have Silicone Labs Dual CP2501 USB to UART Bridge Enhanced Com Port 4 Also have CP2501 USB to UART Bridge Standard COM Port...
  5. Com ports

    in Windows 10 Drivers and Hardware
    Com ports: I just got a new laptop and am trying to orient myself. When I open Device Manager I do not see a listing for ports (Com). Are they hiding it somewhere or did they just decide I didn't need it anymore (it's so "old school"). I need this to program my 3D Printer!...
  6. Com ports

    in Windows 10 Drivers and Hardware
    Com ports: Whenever I try to use serial communation I get an error code #12. The message is I don't have enough room for the com port. https://answers.microsoft.com/en-us/windows/forum/all/com-ports/2cc86c83-2c30-4ef6-b30b-32cbe6508edb
  7. Com Ports

    in Windows 10 Drivers and Hardware
    Com Ports: I'm having a problem with com port #5. It gives me a yellow sign with a quote. Whats happening is when I try to make changes to To my Mitsubishi GX 2000 software program for PLC logic controllers it tells me I have a problem with my comm port. I don't think I'm using a comm...
  8. Com ports

    in Windows 10 Customization
    Com ports: Where do I find the com port's that are assigned to a device that is connected with Bluetooth https://answers.microsoft.com/en-us/windows/forum/all/com-ports/1ebde4c0-a50f-4066-aaf1-ef4c7399ebe7
  9. Serial com ports.

    in Windows 10 Drivers and Hardware
    Serial com ports.: I am trying to use a USB-RS232 lead on my laptop. I cannot create any COM ports and none are there by default. If I try this on my desktop it works perfectly. When trying to create a COM port I get an invalid parameter error and the creation fails Windows 10 Home...
  10. Remove com ports in use?

    in Windows 10 Drivers and Hardware
    Remove com ports in use?: While installing a USB to RS232 ftdi cable I noticed that I have about 20 com ports that say "in use" but are not in fact being used by anything (at least I don't think so). Is there a way to clear those com ports so that they can be used by a new device? Obviously...