When I try to type the letter keys on my keyboard they do not work...but some of the other keys do work....HELP!

hi cathy,since when the problem is occuring ?have you installed new keyboard ? or is it occuring with old keyboard.can you reinstall the driver for keyboard and check the behavior sainath Windows Driver Development

Hi Cathy, You can plug the keyboard on some other's computer to test whether the issue persists. I guess it's the problem of you keyboard. Best regards,Vincent Hu