I am currently updating all machines that we have from ver 3.0 to the newer version 4.0 of Nod32 A-V. A few of our machines have an older version of 4.0 already (4.0.437). I am using Remote Administrator to perform an uninstall on the machines and then pushing the install of the package from Remote Administrator. Is the best practice to uninstall then push the new package via an install, or can I just install the package over the existing version of Nod32 that is on those systems without problems? I have read both that its best to uninstall the previous version of any ESET product first, but I also read somewhere in the help that you can install over the top of a previous version. Just wondering which is best and if it matters which version is already installed on the system before updating in which procedure to use. Thank-you for any clarification.