No sound since reinstall of windows 7

Front Jacks? Can you put up a screen shot of this?

Image attached. In my case I knew it would be something simple, may not be the case for others though. I appreciate once again you help :)

I never did ask you the brand and model of speakers your using, are they 5.1 speakers? In original post, you said one was working and one was not which lead me to believe you only had two speakers. Speaker configuration in your screen shot shows 5.1.

Sorry, in original post I meant one PC was working fine with sound, one PC was not. yes they are 5 in 1 speakers although I only have 2 left. Done me a lot of years, am sure that was part of the problem too lol