Unable To Open Com1 Check Port Settings. Dec 28, 2023 · I tried to use a serial port monitor software to

Dec 28, 2023 · I tried to use a serial port monitor software to troubleshoot but that application also claims it cannot open the port, so my inclination is something is securing all these ports. Mar 11, 2025 · See various ways to detect, enable, and disable the Server Message Block (SMB) protocol (SMBv1, SMBv2, and SMBv3) in Windows client and server environments. Oct 14, 2018 · I have installed the Hyperterminal program, but getting this message when trying set it up "Unable to open COM1. Under “COM port number”, try to select a different COM port. In your condition, you can try to deploy a redirection in GP , so that ensure it will cover all lower settings. If there's a yellow exclamation mark, right-click the COM port and select "Update Driver". May 13, 2025 · Device Settings: Incorrect configuration settings within your device can also block a connection. " Any idea what might be causing this? According to Device Manager the port is working correctly. Steps to Change COM Port in Windows 11 Changing the COM port in Windows 11 can be accomplished through the Device Manager. msc” and press Enter.

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