I haven't received any message stating that the installer was the problem, but using logic after what I'm about to say, its the most logical thing that contains the virus.

I haven't actually downloaded anything with this program yet, never had the chance to before it started doing this.

What I was doing at the time was working on a graphics piece for my deviantart account so when it finished installing, it had 'run' the program and so it opened.

I didn't need it at the time and so thus I closed it, about a minute later it was back. Its been doing this continuously for the since yesterday morning.

Therefore, if I haven't downloaded anything after initially installing the program, it makes the most suited choice of what contains the virus the installer itself.