My wife's HP touch smart, IQ500 Series, Windows Vista's key board becomes unresponsive. It doesn't do it all the time but it does it a lot. I have tried to refresh the page, that doesn't do anything. The batteries are new, I changed them and put other new ones in and still nothing. In ten minutes or so the keyboard will be OK. Oh yes, this is a wireless keyboard, the mouse works good all the time. Does anyone have any ideas as to what is happening.

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