I bought a refurbished desktop HP - 5800 from walmart.com and the mouse and keyboard they sent with it has USB plug on them and I have tried them in every port on the computer and can't get them to work, do I need to get adapter to plug them into the green and purple plugs on the back of computer?
Note the ports to the left of the "blue" video-port. The column of 4 ports all are USB ports. Try the keyboard's connector into one of the 4 ports. If it does not go in, rotate the connector 180 degrees, and it will go in.