When ActiveX controls are deployed through the Web browser on a system with UAC enabled, the user is prompted to install each control asking Do you want to allow the following program to make changes to this computer?
The prompt is displayed the first time each ActiveX control is needed. Users who are logged on as administrators can click Yes to install the specified ActiveX control. Once the control is installed, the user is not prompted again for that control.
If the user is logged on as a standard user rather than an administrator, then an administrator must provide his or her credentials before the control can be installed. To avoid this scenario, deploy the Web ActiveX controls using the Hyland Web ActiveX Controls installer.