I stupidly downloaded an application called "Groover" from a website and unluckily received a lot of pop-up ads delivered by this application. An article which I have found by searching on Google says that Groover is an adware program. It also provides the guide to remove this nuisance. I have followed the first two steps which are the manual removal ones to try removing this adware, but not succeed. I do not follow the third step since it requires me to download certain product to clean all files and registry entries of the adware. I don't know whether the products recommended realiable or not, so I decide not to download none of them. So, do you have any advice? How can I completely remove Groover without buying a product?