You use the linux kernel, mhwd, and additional packages if required.
In most cases this simply means using mhwd (terminal) or Manjaro Settings Manager (gui).
If its required at all, this usually only means graphics drivers.
(no, you do not do the windoze dance of looking up random executables from websites)
Since you are new here, please also familiarize yourself with both the Manjaro System and how to get help here at the forums.