This kind of thing is what makes it difficult for me to recommend open source software to my Windows using friends and clients. My sister was looking for an alternative to Paint Shop Pro for the simple graphics she does, and she didn't want to pay for the next version if she could get something free. Without thinking, I suggested Paint.net, as I've always enjoyed using it over The Gimp on Windows. She went to getpaint.net and, of course, ended up with nothing but adware because the guy behind Paint.net is a talented but very greedy individual[1]. I should have instead pointed her to ninite.com and told her to download Paint.net there. Now she won't trust Paint.net no matter where it comes from, which is a shame because for what she needed it was more than enough.
That's only one of several cases where I've recommended a truly good, open source or freeware app for Windows, to have the person become angry with me for sending them on a spyware-laden wild goose chase. From now on I just offer to install the app they need for them, using ninite.com instead of the original source. And it shouldn't have to be that way.
[1] http://forums.getpaint.net/index.php?/topic/23234-can-paintn...