![How to change the COM port for a USB Serial adapter on Windows 7, 8, 8.1, and 10 - Plugable Knowledge Base How to change the COM port for a USB Serial adapter on Windows 7, 8, 8.1, and 10 - Plugable Knowledge Base](https://media.plugable.com/images/kb/714099/set-com-windows-005-max.png)
How to change the COM port for a USB Serial adapter on Windows 7, 8, 8.1, and 10 - Plugable Knowledge Base
![How to change the COM port for a USB Serial adapter on Windows 7, 8, 8.1, and 10 - Plugable Knowledge Base How to change the COM port for a USB Serial adapter on Windows 7, 8, 8.1, and 10 - Plugable Knowledge Base](https://media.plugable.com/images/kb/714099/set-com-windows-004-max.png)
How to change the COM port for a USB Serial adapter on Windows 7, 8, 8.1, and 10 - Plugable Knowledge Base
![windows - How do I find the device which has Com Port X reserved - want to reclaim the port num for different device - Super User windows - How do I find the device which has Com Port X reserved - want to reclaim the port num for different device - Super User](https://i.stack.imgur.com/g8IlP.jpg)
windows - How do I find the device which has Com Port X reserved - want to reclaim the port num for different device - Super User
![COM port number changes when connecting board on different ports or in bootloader mode – Arduino Help Center COM port number changes when connecting board on different ports or in bootloader mode – Arduino Help Center](https://support.arduino.cc/hc/article_attachments/360016532000/COM_port_changes_2.png)
COM port number changes when connecting board on different ports or in bootloader mode – Arduino Help Center
![Error "Board at COM4 is not available" when I click on serial monitor. - Installation & Troubleshooting - Arduino Forum Error "Board at COM4 is not available" when I click on serial monitor. - Installation & Troubleshooting - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/8/0/f/80f5ac4a803ca55201a600d9124522f02a1edeab.png)