Put vista ultimate x64 on my machine courtosy of free copy a mate got given and didnt want.
Anyway, this is my desktop machine but I figure its more likly to get an answer in here then the other places since its an audio problem.
In XP, there was a tickbox in the HD audio mixer to make it so I could tell it what was plugged into the front jacks, this is missing in vistas version of the realtek HD aydio manager, and when I plug in my headphones, nothing happens in the mixer, the jack doesnt get enabled for a second stream like it did in XP. I had to tick the box and set it to headphones for it to work in XP, cant do it when the box isnt there.
Its the gigabyte 780g board if it matters, I am sure other people must have had this problem.