I usully use my Pavilion laptop connected to a larger monitor & use a wireless keyboard & mouse without problems. I disconnected last evening to take the laptop out with me. When I returned & reconnected,I found that my mouse & keyboard won't respond. I have change the batteries in both.  When I look at help sites it suggests to put receiver close to mouse & tp press connection buttons on mouse and bottom of keyboard. I have no connection buttons on either. The mouse is microsoft & has a USB connector. The keyboard is microsoft. I have only had problems since disconnecting & reconnecting. I am totally illiterate in computer speak.  Can you please help? I am in the middle of a degree assignment & this is the worst possible time for computer problems.