When installation is complete, reinstate original server settings across the farm.
On the server used for running the installers, reinstate the following server settings (see Set up server used for running installers):
User Account Control: reinstate at the original level
User account rights: If you added the Farm Installation account (or other user account used for installation) to the Administrators group for the server on which you installed Nintex, remove the account from the group. Leaving the account in the Administrators group results in report warnings from the SharePoint Health Analyzer.
Group policy for script execution: reinstate if needed
On all servers in the farm, reinstate the following server settings (see Disable antivirus software):
Antivirus software: re-enable original programs