Moved this from the report center to Lansweeper Questions. Please note that the report/installer/action centers are for posting finished reports/installers/actions, not questions.
In regards to your question: actions are run in the security context of the user initiating the action. If an action (like the Event Viewer one) requires administrative privileges on the target computer,
the user initiating the action must have those privileges. The access denied error you're referring to seems to indicate that your user lacks the necessary privileges. You could use
runas.exe to run the action as a different user.