Windows 7 My Advent speaker system ade-210c are no being recognised

[Sam Edwards]

i have come on to the computer to realise my speaker system is not working after being fine for many months now , to be told off my farther that he removed a program and cant remember what it was called . this has caused the system not to recognise my speakers saying that there is no audio outout device installed

i am un able to re install such program without knowing what is it .
is there anyways of finding out which program this is ?
or does anyone know which program they think it may be ?
many thanks