This message occurs if your screen resolution is set too low. The minimum resolution for Cashbook Complete to operate is 800 x 600 pixels. Increase the resolution to 800 x 600 pixels or higher to fix the problem.
If your screen resolution is already set to 800 x 600 pixels or higher then check that your “DPI” setting is set to “Normal” within Windows “Display Properties”, under the “Advanced” options.