How to disable COM ports in Windows 10?

To remove unused COM ports, right click on the greyed out USB Serial Port items and select “Uninstall device”. Do not select the driver removal option. It is now possible to assign additional COM ports to your computer and devices will no longer appear as unrecognized COM ports.

Method 1 – Using Registry Editor

Type “regedit.exe” and press Enter to open Registry Editor. Click on the boot option to open the Edit DWORD (32-bit) Value window. A) To disable USB ports or drives, replace “value data” with “4” and then click “OK”.


  • Go to Windows Device Manager > Serial Multi-Port Adapters.
  • Select the adapter and right-click to open the menu.
  • Click the Properties link.
  • Open the Port Configuration tab.
  • Click the Port Setup button.
  • Select the port number and click OK.
  • Click OK to apply the changes.
  • April 24th. 2021 .

    Answers (5) 

  • Open Device Manager.
  • Click Show in the menu bar and select Show hidden devices.
  • Find the ports (COM and LPT) in the list.
  • Check the COM ports by expanding them.
  • 5 na 2019

    How do I delete all ports?

    The Device Manager window opens. Click “View” in the menu and select “Show hidden devices”. Expand Ports to list all COM ports in use. Right-click on one of the grayed out ports and select “Uninstall”.

    In order to do this:

  • Right-click My Computer and choose Properties.
  • Select the Hardware tab and open Device Manager.
  • Under “Ports (COM & LPT)” right-click on the COM port and select “Properties”.
  • Select the Port Settings tab and press the Advanced button.
  • 2 oui. 2010 .

    Should I block port 445?

    We also recommend blocking port 445 on internal firewalls to segment your network – this prevents ransomware from spreading internally. Note that blocking TCP 445 prevents file and printer sharing – if this is a business requirement, you may need to leave the port open on some internal firewalls.

    You can check which device is using which COM port in Device Manager. It will be listed under hidden devices. … Open Device Manager. Select the COM port. Right-click and then click Properties/Port Settings tab/Advanced button/COM port number from the drop-down menu and assign the COM port.

    Which ports should I block on my router?

    For example, the SANS Institute recommends blocking outbound traffic using the following ports:

    • MS RPC – Port TCP and UDP 135.
    • NetBIOS/IP – Ports TCP and UDP 137-139.
    • SMB/IP – Port TCP 445.
    • Trivial File Transfer Protocol (TFTP) – UDP port 69.
    • Syslog – port UDP 514.
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    16 Oct 2015

    To determine if this is the problem (and hopefully fix it), try changing the assigned COM port.

  • Go to Device Manager > Ports (COM & LPT) > mbed Serial Port, then right click and select “Properties”.
  • Select the Port Settings tab and click Advanced.
  • Under “COM Port Number”, try selecting a different COM port.
  • Nov 29, 2019.

    How do I test if a port is working?

    To test if the computer’s COM port is working properly, you can perform a simple loopback test. (A loopback test involves sending a signal from a device and sending it back, or looping back, to the device.) For this test, attach a serial cable to the COM port you want to test. Then short pin 2 and pin 3 of the cable.

    Why can’t I see any ports in Device Manager?

    As I mentioned at the beginning of this article, users cannot see COM ports directly. Instead, they should open Device Manager -> select the View tab -> select Show hidden devices. After that you will see Ports (COM & LPT) option and just need to expand it to Aileron COM ports.

    How do I check my ports?

    How to find your port number in Windows

  • Type “cmd” in the search box.
  • Open Command Prompt.
  • Enter the netstat -a command to view your port numbers.
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    June 19th. 2019

    Click on the + sign in front of Ports (COM & LPT). The list now shows all assigned ports, regardless of whether they are connected or not.

    How do I know which USB port is being used?

    Use Device Manager to determine if your computer has USB 1.1, 2.0, or 3.0 ports:

  • Open Device Manager.
  • In the Device Manager window, click the + (plus sign) next to Universal Serial Bus Controllers. You will see a list of USB ports installed on your computer.
  • 20 times. 2017 .