(this is just one such example)

the author is looking to have you purchase this fraudulent software. This is a type of social engineered adware that is simply looking to part you from your money with nothing to show for it. This malware should be removed immediately.

There is no ONE best approach for malware removal because each infection is unique.  Malware infections typically may take many hours to remove using several to many tools depending upon the infection. Severe infections may take days. To learn more about different types of malware visit viruslist.com.

When to cut your losses

In many cases malware may be successfully removed from a system. In the case of backdoor malware, you may not be 100% sure it is all gone. In these extreme cases you will need to backup your data, reinstall the operating system, reinstall software and restore your data.

Set a time deadline and keep it.

You will have to make the determination what your time is worth. If the deadline is past and malware issues are still present after your best efforts, take the computer to a local professional, contact us, or backup your data and do a clean installation of your operating system. Emsisoft has a great article titled: On the sense and senselessness of Malware cleaning that helps clarify this point. Bottom line, spend more time avoiding infections by practicing good computer security habits.