, Welcome to Bleeping Computer..
Combofix is not really a tool that the general public should use. It shoul come with a label like"Not for General Consumption" if you know what I mean. It is very powerful tool and should only be run with an experts guidance. Such as one of the experts from our HiJackThis Team.
Using Combofix without proper knowledge can Make your PC unuseable.
That is why you don't find a link here at Bleeping Computer.
If you are infected or wonder if , post your problem in the "Am I Infected