Complete the following steps with administrative privileges. Take Windows Server 2012 R2 for example:
2.Right-click the Uninstall NetBrain Front Server app in the pane and select Run as administrator from the drop-down list to launch the Installation Wizard.
3.Click Yes when a confirmation dialog box prompts.
4.Select the Delete all existing user data check box to delete all registry information and files under its installation path, and then click Next.
5.Click Finish to exit the Installation Wizard.