This, my friend, is a tricky question, as this is not what we do. Yes, I do download free stuffs, but then I do care to know what are the illegitimate & unwanted stuffs linked. In that case, I either do not install, or if I do so, then without this spyware, as these can cause you much harm then a normal wound. These penetrate into the kernel of the system, pick out the personal stuffs from your system and leak them out to the creator or into the web. Please be sure of what you deal with.
I would suggest use MBAM or MSSE, which you will find here on the site & make sure that you are rid of this malicious stuff.