My fix for graphical laser beams..... messing around in the advanced video graphics options, when i swiitched rapidly from 1080p to windowed mode and then back to 1080p my screen went completely black for a few seconds and when it reloaded the graphics all the laser beams were gone for good. I played about 12 hours straight after that with no anomolies. ps I had a popup message that asked me to reboot the game but i clicked cancel and just kept on playing. this worked for me!!!! GPU - radeon hd 4890 + radeon hd 4870 CROSSFIRE