Selv 0 Posted August 19, 2009 I have been installing 4CH AVTech Mpeg4 across a 85 store chain for the last couple of years. I purchased the DVR a few at a time and over time have ended with several versions of the AV760 unit. Now I seem to be having more and more problems with the units and their viewing software. Sometimes I attempt to backup video and the camera channels don't populate. On the newer version of the video viewer I don't even get the Backup feature with some units. What would be the best version to insure the maximum compatiablity with the fewest bugs? I run a windows based PC. Thanks Share this post Link to post Share on other sites