If the application worked well in the first installation, then there is something wrong that you're doing while installing. First close all the background applications. This will ensure that none of the applications will interfere with the DVR software. Secondly, select the setup package and right click it. The most common errors are caused by the lack of the security privileges assigned to the users. This means that you should choose Run as Administrator to be able to provide the application all the necessary rights files to copy and install the drivers.
