@Miga Are you using a USB 3.0 port or USB 2.1? I've had radio interference with the USB 3.0 ports before (on my PC) and it screwed with my wireless mouse and keyboard pretty bad. The fix I used (when I had no other options but a USB 3.0 port) is to use a USB 2.1 hub that's on a cable that moves the dongle physically away from the USB 3.0 port itself, and that seems to work.