Hi,
The installation of tool bar, in some programs there are available screens and in some, they would ask you to close the entire browsers, and then install. You do not know what is being installed at all until it finishes. In cnet programs, which i used to download freewares, they started including PUP, potentially Unwanted Programs along with their search engine tool bar. There is no option to uncheck, and there are programs which will automatically downloaded with original programs. I also wrote to the cnet, but ony got evasive replies. If they are succeeding in installing their search engine, this will change your google search not to appear when you connect to the internet. The seach option of these tool bars are very limited or none at all. Then you have to uninstall using manual method of removing these in computer and as well as in registries. It has taken three hours to find those registries. Working with registry involve risking of your computer not starting at all.. So, if there is anyl tool bar associated downloads, i select majorgeek.com, which does not allow anything other than the original. File hippo is also one another safe download site.
Hope that i explained