It started about a month ago when I bough the keyboard Razor "Deathstalker", The problem consisted of the LED lights on the keyboard blinking and mouse or any USB device plugged in unresponsive, even unplugging them and putting them back in does not have any effect. Initially thinking It was a problem with the keyboard I traded it for the Razor "BlackWidow". The problem persisted but the keyboard was no longer affected. I followed this topic http://www.bleepingcomputer.com/forums/t/573048/mousekeyboard-shutting-down-during-games/ to see if there were any solutions, I tried one of the suggestions Disabling the USB selective suspend but it had no effect, It seems that Disabling the program razor prompts you to install "Razor Synapse" Was causing problems for him but the problem still consists for me. During the most recent Failure of the mouse and other USB devices using the keyboard I navigated to the control panel to view devices and printers to see if anything was going on there, It says the following things need trouble shooting when I clicked on my PC: Ethernet Controller, SM Bus Controller, Universal Serial Bus (USB) Controller, and a Unknown device. This occurs even when mouse and keyboard work. I am not sure if this is significant or not.