I have a Dell XPS 8300 desktop with a Logitech mouse and keyboard. Lately, they have started lagging bad (in games and just at desktop), and they will blink or have the lights on them go off completely. Trying different USB ports doesn't help. Rebooting makes it work for a few minutes. Just the desktop doesn't freeze (but will lag), but playing an MP3 will do it, or running any game. The computer has been running fine for a year and a half and no new peripherals have been added. The mouse and keyboard work on another computer, and using another mouse and keyboard on the problem computer will have the same problem. It affects both the mouse and the keyboard. If it was a driver, would it hit both? I will try reinstalling both drivers tonight. Running games in Safe Mode seems to cause the same problem.