One of the USB ports on the front of my computer suddenly stopped working. I then went into Device Mananer and under Universal serial Bus Controllers, uninstalled the first two items listed, hoping that when I re-start, what I uninstalled would be re-installed. But that is not the case. When I switch the machine on again, both the keyboard and the mouse no longer work. Only the start screen appears. Neither the light on the keyboard nor the light on the mouse come on. And the only way to switch the computer off now is to unplug from the mains. I am running Windows 8. Can someone please help?

Please help.
Thanks!

I didn't find the right solution from the Internet.

References http://www.techadvisor.co.uk/forum/helproom-1/windows-8-not-recognising-keyboard-mouse-4234854/

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