Hi guys, i've got an annoying problem, and i need some help! I got a new mouse as a christmas present (Logitech G400s), and I found terrible lagging problems in some games such as "counter strike global offensive", "systemshock" and "bioshock infinite", but the weird thing is that I have no problems in games like "the stanley parable", "batman arkham origins" and the whole mass effect trilogy. This is a really bad problem, because when i move the muse, the FPS drops to 0, and the sound is blocked (!) another weird thing is that my mum's 10-euro mouse works perfectly!!! I have to tell you that windows 7 recognised the mouse successfully, and installed the drivers with no problems. Is that a problem dued to the mouse's DPIs?? please be so kind to answer me in an quite simple English, since I'm italian. Thank you in advance.