LOL,i also had this problem a while back and still sometimes it comes back...(like a disease it is),there is no solution for this (i guess) because i also searched everywhere and found nothing and as for me the last time it occured was waaaay back and it solved itself after 5 min ,i had to do nothing....maybe just wait for 5 min ,on/off it...,or restart your computer entirely...,and i have the logitech MK250 and it is pretty good,nothing of this sort ever happened to it.i am pretty sure it is because of some minor malware messing with your system.