Hi
Welcome to the HP Support Forums! 
I understand that your keypad is freezing up on your HP Pavilion G6 PC. I will try my best to help you with this. To better guide you, could you please tell me the full model or product number of your computer and the operating system that is running on it. Here are some guides for How Do I Find My Model Number or Product Number? and Which Windows operating system am I running?. When you say the keypad, are you referring to the keyboard or the touchpad?
Please let me know and I will be happy to help you with this.
Thank you and have a nice day!