How to clean up junk advertisements on electronic whiteboard

Clean up in the control panel of the electronic whiteboard.

This should belong to the webpage pop-up advertisement. You can try to find the control panel inside the computer, the Internrt option, and check the Enable Pop-up Blocker under Privacy.

The projection of the projector behind the electronic whiteboard only shows the computer image from the back of the whiteboard, so the user can operate naturally and will not block the projection light to produce any shadow. The system composition of the rear projection electronic whiteboard is the same as that of the front projection, which integrates the projector and reserves space for the PC.