I don't think the wireless network adapter will be effecting the keyboard and mouse, you could try disabling it in Network Connections to be sure.
Does your wireless keyboard and mouse have a device which plus into your USB port? I presume it does. Try unplugging this, then plugging it back in - does your PC tell you it has found a new piece of hardware? Also, wireless keyboards and mice usually contain batteries, do yours? and do they need to be replaced?