Thank you, I have done that and it has restored my Realtek much to my relief.
I am now where I was without sound. When I try to place the volume control icon on the task bar it says:
Windows cannot display the volume control on the task bar because the volume control program has not been installed. To install it, use Add/Remove Programs in Control Panel.
No good, also in my efforts it has said I do not have SndVol32.exe installed. I am completely lost here, because it was working fine one moment and nothing the next for no known reason. Anyone know what is happening, please?