I tried that, tried way back, way forward, shooting at all points around the bottom of the screen.
this usually happens when I have not correctly calibrated the top left and right pointers as I used my arm too much, but it accepted them anyway.
usually I have to shut my PC down when this happens, sometimes I threaten to shut it down, then choose cancel when windows prompts me to force close all apps, I can then get to using my PC again as the calibration has force ended as if I have unplugged my USB port.