Please try the steps in the AI Answer first, especially checking for stuck or sensitive keys and temporarily disconnecting the external keyboard.
If the panel still opens by itself, disconnect any other input devices, such as a mouse, wireless receiver, controller or dock, and test again. You can also check Settings > Windows Update > Advanced options > Optional updates for available keyboard, touchpad, touchscreen or input-driver updates.
If it continues, try a clean boot by following How to perform a clean boot in Windows. This can help determine whether a background app or input utility is causing the problem. Remember to return Windows to normal startup afterward.
*Disclaimer: A "clean boot" starts Windows with a minimal set of drivers and startup programs. It helps to determine whether a background service is interfering with your game or program and to isolate the cause of a problem.
These steps of "clean boot" might look complicated at first glance. However, to avoid any trouble for you, please follow them in order and step-by-step so that it will help you get back on track.
If the issue also happens during a clean boot, run the following commands one at a time in Command Prompt as administrator, then restart the computer:
DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow
Allow DISM to finish before running SFC, and keep the window open until the scan reaches 100%.
Please also let me know the computer’s make and model, Windows version and OS build, whether it has a touchscreen and whether this started after an update. Please leave out the serial number and product key when replying publicly.