I've just been talking to him on the phone, and I'm afraid the conversation didn't reveal much. This guy knows less about computers than I do about nuclear physics (and that ain't much!)
I should add that I know nothing about Skype myself - so this is a case of 'the blind leading the blind'!
TT - what Skype version is the latest, please? I tried a Google search, which gave me the impression that there's a new beta available. However, I don't think I should installing a beta for this guy. Unless you recommend otherwise? As for the Test Call - he said yes, he had done this, but he didn't sound very convincing.
I'm going to pop over to see him tomorrow, so if anyone has any suggestions for what I should check out, I'd be very grateful. I've printed out Skype's sound setup routine from their website.
PS - when you are at his PC, in Skype, go to Tools>Options then you will be able to see everything that is applicable. Just check each item in turn. Having checked an item, click on Save at the bottom of that window, though you will then need to go through Tools and Options again to continue with the other items.