hello my name is tiffany and i accidentlly delted the sound on my computer is says there is no mixer somethin and i have no idea on how to fix this isearcha dnserach andsearch the internet to try and find answer can someone please help me i am a single mother of to so it has o be free please please please please help me my 3 yr old son loves gettin on nick jr and he cant now cause there is no sound please help