Windows 10: Can't Open Com Port

Discus and support Can't Open Com Port in Windows 10 Drivers and Hardware to solve the problem; I am running into an issue with multiple hardware devices and multiple applications when I try to connect to a USB device, Like a USB to serial... Discussion in 'Windows 10 Drivers and Hardware' started by FLS12, Jun 24, 2020.

  1. FLS12 Win User

    Can't Open Com Port


    I am running into an issue with multiple hardware devices and multiple applications when I try to connect to a USB device, Like a USB to serial converter, applications show com port in use or can't open com port, the work around I have found is to connect to the devices within a few seconds of it being plugged in to the USB port. one application i am using is putty to open a terminal on a com port with a USB to serial device connected, it work fine when I connect using the work around but shows can't open COM4 if the device has been connected for longer than a few seconds. Any help on this would be greatly appreciated!!

    :)
     
    FLS12, Jun 24, 2020
    #1
  2. spapakons Win User

    USB Port Oddities


    Ok, let's see it with pictures step-by-step. First right-click on the USB device and select Update driver software:


    Can't Open Com Port [​IMG]


    Then select Browse my computer for driver software (LAST option) :


    Can't Open Com Port [​IMG]


    The select Let me pick from a list of device drivers on my computer (LAST option) :


    Can't Open Com Port [​IMG]


    Then select the standard driver from the list and click next:


    Can't Open Com Port [​IMG]


    Click next/OK as required to complete installation. Repeat the steps for all Intel USB devices. Finally click on each USB root device and press DEL to delete it, reply YES when asked. After deleting all USB root devices restart the computer.

    I hope this is detailed enough...
     
    spapakons, Jun 25, 2020
    #2
  3. Junaid_A Win User
    Port is being blocked

    Hi,



    Thank you for writing to Microsoft Community forums.



    • Are you aware of any changes that happened on the computer prior to this issue?


    Upon researching, this seems like an issue due to the port scan. You may want to try the steps listed below and check if it works.

    • Login to your Netgear
      NX6200 Extender GUI
      .
    • Click on Advanced tab and choose
      WAN Setup
      .
    • Check the box for Disable Port Scan and DoS Protection.
    • Allow it to update and check if the port is still being blocked.


    However, if the issue persists, I suggest you to post your query in the
    TechNet Forums, where we have support professionals
    equipped with knowledge on port forwarding.



    Regards,
     
    Junaid_A, Jun 25, 2020
    #3
  4. Can't Open Com Port

    ISP Blocking Port Forwarding Conspiracy???

    I've come across a few posts that suggest that some cannot open/forward ports from their modem. It's been suggested that it's a direct result of ISPs trying to crack down on torrenting. However, I am not sure how true this is. Is there a way to test this? Is there a way to see if a port is forward on your modem if it's open or not?
     
    EastCoasthandle, Jun 25, 2020
    #4
Thema:

Can't Open Com Port

Loading...
  1. Can't Open Com Port - Similar Threads - Can't Open Com

  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. Virtual COM port

    in Windows 10 Drivers and Hardware
    Virtual COM port: Looking for software to create a virtual COM port in a 2018 Microsoft Surface (LTE/4g model) https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/virtual-com-port/e2876692-3b02-49a7-a38e-3ffbfd70d472
  10. 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...