How do I find COM ports in Windows 7?

1) Click Start. 2) Click Control Panel in the Start menu. 3) Click Device Manager in the Control Panel. 4) Click + next to Port in the Device Manager to display the port list.

How do I see all COM ports?

  1. COM ports assignments can be viewed from the Windows Device Manager.
  2. When the Systems Properties dialog window opens, click on the Hardware tab.
  3. On the Hardware tab, click on the Device Manager button.
  4. In Device Manager, click the + sign next to Ports (COM & LPT) to reveal what ports are currently in use.

How do I see all COM ports in Windows?

Replies (5) 

  1. Open Device Manager.
  2. Click on View in the menu bar and select Show hidden devices.
  3. Locate Ports (COM & LPT) in the list.
  4. Check for the com ports by expanding the same.

How do I delete COM ports in Windows 7?

  1. Launch Control Panel\All Control Panel Items\Devices and Printers.
  2. Click on any of the listed printers.
  3. Click “Printer server properties”.
  4. Click the Ports tab.
  5. Select the port and click “Delete port”.

How do I test if a Port is working?

To test if the computer COM port is functioning correctly, you can do a simple loopback test. (In a loopback test, a signal is sent from a device and returned, or looped back, to the device.) For this test, connect a serial cable to the COM port that you want to test. Then short pin 2 and pin 3 of the cable together.

How do I clean up unused COM ports?

Click “View” in the menu and select “Show hidden de- vices”. Expand “Ports” to list all COM ports used. Right click on one of the greyed out ports and select “Uninstall”.

How do I find hidden COM ports?

Click Show hidden devices on the View menu in Device Manager before you can see all devices associated with the computer. 5.) Scroll down to the Ports section and you will be able to see all the hidden and unused COM ports. The hidden com ports have a grayed out icon next to them.

How can I get free COM ports?

The freed up COM port can be assigned to another device. Find your device in the same branch, and open the Properties window. Then go to the Port Settings tab and click Advanced. In the dropdown list, select the free COM port.

How do I clear all COM ports?

How do I release COM ports?


  1. Please go to Start, type devmgmt.
  2. In Device Manager, double click Ports (COM & LPT) to expand this section.
  3. Right click Communications Port (COM1) and then click Properties.
  4. Click Port Settings tab and then click Advanced…
  5. Pull down COM Port Number list, choose one of the com port in use and then click OK.

What ports are open on Windows?

Now that the Web Site Connectivity is turned on, three ports are open on the Windows Home Server firewall. They are the following: port 80, port 443, and port 4125. These ports are opened so that your Windows Home Server can accept incoming requests from the Internet.

What ports are open on PC?

A number of ports are safe to open such as the ones used for Internet access, email and FTP file transfers. Common port numbers that typically may be open include 21, 25, 80, 110, 139 and 8080.

How do I find open ports?

To find open ports on a computer, you can use netstat command line. To display all open ports, open DOS command, type netstat and press Enter. To list all listening ports, use netstat -an |find /i “listening” command. To find specified open port, use find switch.

How to check open TCP/IP ports in Windows?

extract the exe file to your desktop and double-click on it.

  • you will be shown a user agreement. Agree to the agreement and you will instantly see all the TCP connections.
  • you can end the connection and free the port.