I would like to add that prevention is better than fixing. We usually get this kind of malwares through clicking ads that offer something that are too good to be true, clicking yes (or no) from pop-ups, opening email offers wherein we don't know who sent those emails, or visiting websites that are infected with those malwares.
I would like to recommend that we should always update our security softwares as often as possible. Anti-virus or anti-malware programs, whatever name they have, work the same by preventing unwanted programs in entering your computer so updating them always would make these programs more reliable.
We also have our part to do in preventing our computers to be infected with these nasty programs. Let's not click advertisements that are not practical like "you are the 10th visitor, click to receive the prize". Then when there are pop-ups, we should carefully read the instructions and not click the "NO" button immediately because sometimes the no button will open the website instead of deterring from it. Please don't open offers from emails which you have no idea who sent those because some of the websites in those emails are infected with malwares.
Malwares, or malicious softwares in proper term, are easy to avoid but we must do our part for our computer to stay clean from these nasty programs.