Log in as admin Make sure that the admin setting pathtophp is set correctly. Install demo plugin mdl75308.zip (copy to site local/ directory) Navigate to Server > Tasks > Scheduled tasks in site administration Confirm MDL-75308 Demo task task has a Run now button Press said Run now button Confirm you want to run the MDL-75308 Demo task task Confirm task executes successfully (you should see Success in the task output) Back on the scheduled tasks page, take note of a plugin with the " Run now " link shown (e.g. " Background processing for assignment module ") Open a new tab and go to Site administration / Plugins and disable the plugin that the task belongs to (e.g. from the previous example: Plugins > Activities > Manage activities, then hide the Assignment plugin) Reload the scheduled tasks page Confirm that the scheduled task does not show the "Run now" link anymore.