When the "Measure continuously during pre-calibration adjustments" option is enabled, a continuously measurement during Brightness adjust and RGB Slider adjustment.

This may create a conflict when you have your monitor OSD menu in the middle of your monitor to do brightness adjustments. Therefore, you can disable this option in the Advanced Settings.

-On Mac, go to the Spyder X2 menu (next to the Apple menu) -> Preferences -> Advanced Settings.

-On Windows, go to the menu bar File menu -> Preferences -> Advanced Settings.