problems with CKEditor install in drupal 7
It's an issue that happens from time to time. 

The instructions that you see are fine:


  Extract the archive and copy its contents into a new folder in the following location:
  sites/all/libraries/ckeditor
  
  So the actual library can be found at: sites/all/libraries/ckeditor/ckeditor.js


If the issue is caused by the message "The version of CKEditor could not be detected." at admin/config/content/wysiwyg.

This solution helped me yesterday:


Open "\sites\all\libraries\ckeditor\ckeditor.js" file in a text
editor. 
Add in the first line of the ckeditor.js file:

// version:'4.4.4',revision:'4391'


and save it.

You can get more help about this module on the documentation page.