The best keylogger scanner on the internet is, largely, a debate.
Some people claim that it is one product while others give an entirely different view on the subject.
In reality, the best keylogger scanner is the one that keeps your personal information safe and your computer secure.
You should be purchasing the keylogger protection that best suits you, not what the market claims will give you the fastest running computer or something along those lines.
In order to choose the best keylogger scanner for you, you should do some market research, obviously.
Take your time and make sure that the product that you are purchasing or downloading off of the internet is the one that you are truly wanting.
Some will be free and others will cost money so, if you plan on sinking some funds into the whole thing, make sure that you are paying for something that will actually help you and not what the reviews say is the best.
Who knows, you might end up with something that does not work on your operating system or something of the like and you will have to spend more money to purchase something that will, in fact, work for you.
Once you have found a program that both works for you and your computer, download it or pay the up front purchase price and being the installation process on your computer, be it Windows or Linux operating systems.
The program should properly install with a walk through so that you don't get lost or confused throughout the process.
It will show a pop up once the installation is done and you can then proceed to use the program to defend your computer and your personal information.
In the end, it comes down to what is best for you, not the market or the majority of the population.