Multiple key pressing at the same time

Im using android emulator to play mobile games and i use scripting to run sequencing of keystrokes. All of sudden my keyboard start pressing keys automatically. I tested ghost key presses at keyboardtester.click and found few keys are ghost pressing on my keyboard. I dont want to reinstall my emulator. Can any one help .. i have already tried driver unintall etc. canr run antivirus as well. Thanks in advance.