This section provides guidance for uninstalling Nintex Workflow and Nintex Forms.
To remove for reinstall:
Run the IISreset command on all servers in the farm to ensure that Nintex assemblies are not write-locked. Make sure you run this command after a failed installation of the installer package.
Retract and remove Nintex solutions from the farm, first for content web applications, and then for Central Administration. For retraction and removal instructions, refer to the following MSDN article: http://msdn.microsoft.com/en-us/library/office/aa543958(v=office.14).aspx.
To remove completely (no reinstall intended):
Remove all Nintex entries from the relevant web.config files. For more information, see Enabled actions (safe controls).
Remove all Nintex assemblies. For more information, see Nintex assemblies and features.
For more detailed guidance on complete removal of Nintex Workflow and Nintex Forms, see the following uninstall documents on Nintex Connect.