when i turn on my computer i usualy need to give password to turn it on, but now when i turn on the cpu and the password screen comes up, but i cannot use the keyboard and mouse. only thing i can do is shutdown from the cpu and turn on and still same issue.
More aboutkeyboard mouse dont work windows
look in the bios for enable usb keyboard and mouse and enable them if yours are usb
Do what mcnumpty23 said first, then if it doesn't work update the drivers for the specific model of keyboard and mouse.