Those links seem to adopt an 'overkill' approach. Simply running a decent anti-malware program (and, if necessary, resetting anything within your browser that's been changed, such as your home page) should be all that's needed to do the job.
If you've already got Malwarebytes Anti-Malware on your computer, run it. (I don't recommend it as a new program though, as it gives you a free trial of the 'Pro' version, which can slow some computers down). If not, download and run AdwCleaner. (There's no installation process. You simply run the downloaded file directly):
https://www.malwarebytes.com/adwcleaner/