What to do if IE doesn't allow to install plug-in?

Applies to:

DL41B/DL81B/DL41A/DL81A/DL41D/DL81D/DH81S/DH81X/DH81NG/DM41D/DM41A/DM81A/DN41D/DN81D/DN41S/DN41NA/DM41H/DM81H/DM21O/DM31O/DE41N/DE81N/DN81NB/DM81Z/DM61W/DG81CP/DG81CQ/DH81NK/DG81CR/DH41NK/DM41G/DN41CJ/DN81BJ/DN61EC/DG81W/DG61X/DG41T/DT81DQ/DT41DC/DT61ER/DG41BE/DG81BE/NP41F/N43SU/N44SU/N48PZ/N481U/N441U/N44PBD/N461W/N48PAU/DN81Q/DN41Q/NW41V/N441H/N441K/N28WEB/N441B/N441D/N441L/N44PAN/N44PAJ/N34WDB/N34WDD/N44WEB/N44WED/N44WEC/NW41V/N48PT

When view on computer browser, it's necessary to install a plug-in to display live video from system.

The IE browser?keeps coming up a window to ask you to install plug-in, or it says windows has?blocked this software since it can't verify the publisher, even if you have already installed the plug-in.

Here is instruction to solve such kind of issues.

Finally, refresh the page and install plug-in again.