Adjustable computer touchscreen display mounting device adds an anti-toppling support system to prevent a computer touchscreen display device from toppling despite multiple operating positions. The touchscreen display may be repositioned in a variety of touch modes, which are primarily horizontal, and/or monitor modes, which are primarily vertical. A display base is held close to a desk surface whenever a toppling force is exerted on the display base. One anti-toppling support system pivotally connects anti-toppling arms, one arm being attached to a desk and another arm attached to the display base. In one touch mode, the touchscreen display is extended away from the display base far enough to shift a center of gravity for the combination of display and base outside of the base footprint.