thank you for your reply but your answer is very typical of everyones answer that ive read up on, check your mouse cable, check your bios check this check that, I have now been playing for a few days with no disconnection, ive just slipped my mouse mat under the mouse and hey presto bing bong. my mouse mat is not a cheap mat, it was a rather expensive gaming pro mat. all iam saying is if you are having this problem just try taking your mat away and see if it helps. my mat doesn't even have to be under the mouse just near it, its like theres a static or something. the mat is lovely and smooth nu bumps and ive not had it that long...