What do you mean by mess up?
ComboFix is a specialized first responder tool
that has the ability to deal with multiple malware infections and has built in removal functionality which makes it very powerful. Combofix is intended by its creator to do two things: 1
) automatically remove known infections and 2
) provide a detailed system report similar to DDS that a trained expert can use to further investigate and remove malicious files and registry entries.
ComboFix is safe to use by someone trained
in how to use it or when following instructions provided by a trained expert helper (see here
) who is assisting them deal with a malware problem. Combofix was never meant to be used
as a general purpose malware scanner like SuperAntispyware or Malwarebytes' Anti-Malware which scan individual drives or different folders on a computer for malware.