Think I solved it, had a flick through the BIOS and everything was relatively uninteresting until I found wake on PME event. I turned this off and yeah, seems to work. Can no longer turn it on by turning the speaker on
Thanks all for the BIOS suggestions!!!
AddRAM: Yeah you are right but I guess bad practice and habit are whats stopping me. I have 2 surge protectors coming from the dual wall sockets each more or less full, at night (or whenever I turn my PC off) I just shutdown. I never turn them off at the wall.