Just had this issue confirmed as a bug by technical support. I'll post it here in case anyone else is having the same issue... Trying to push ESET Packages to Windows 7 fails using 4.0.122: Installations fail with Remote Registry Opening (even though Remote Registry Service is started). Installing manually using the same credentials works fine. Uninstalling existing installations that are password protected fail. Here's what the MSI Installer Service says in Event Viewer: "Product: ESET NOD32 Antivirus -- Error 5004. Enter a valid password to continue uninstallation." The workaround here is to remove the password protection and retry the uninstallation again - which will succeed. None of these issues are present on v3.1.15. I'd recommend sticking with v3.1.15 till this issue is fixed as the Push Installation side of things is totally useless to us at the moment.