Hello Andrew,
You can only take the exam using a single display. If you're using a laptop with an external monitor, you'll need to disable your laptop’s built-in screen by simply closing the lid. Keep in mind that this will also block the keyboard and trackpad, so you'll need to use an external keyboard and mouse.
The exam environment, which boots from the USB drive, is designed to prevent your laptop from going to sleep when you close the lid. Instead, it should disable the internal display and make the external monitor the sole primary screen.
However, there can be compatibility issues where the laptop goes to sleep anyway when closing the lid. In that case, you may have to leave the lid slightly open and manually set the display to mirror in the display settings.
Based on what you described, I suspect you’ve already tried these steps. When enabling the mirroring mode, your internal display, despite showing the mouse pointer on the external monitor as well, refuses to give up, to turn off when you close the lid, or to fully mirror to the external monitor, and remains primary, so all the pop-up windows and messages are shown there. You cannot take the exam like this, of course.
It seems to me as a compatibility issue with your graphics card and its drivers.
Potential solutions
I have a few suggestions that might resolve this issue:
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Change BIOS Settings: If your laptop has both a dedicated and an integrated graphics card, you might be able to switch between them in your BIOS settings. Changing this could help with the compatibility.
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Wait for a New ISO Version: If you're unable to change your BIOS settings, or if it doesn't solve the problem, you may need to wait for a new version of the Exam ISO.
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Use a Different Computer: The most immediate solution would be to use a different computer for the exam.
I hope one of these options helps you move forward with your exam.
