My computer is problem when I open window it shown press ctrl+ alt+ delet but it didn't open. Can you help me this problems?

Not knowing what operating system you are running I have to guess windows and you are dealing with a locked screen or login window. If you prees "TL+ALT=DEL" and get no response check that the keyboard is plugged in and functioning try depressing the "caps Lock" and look for the indicator light that shows that caps lock is on. If you get no response from the computer or do not see the light unplug and replug the keyboard. Aldo if you have not already done so reboot the computer