Your registration information is stored in your registry. The uninstall process doesn't actually remove the registration data in the registry (because it is actually entered after the install process is complete). The problem we're seeing here isn't related to the registration data.<br><br>I wonder if there's a problem with the exclusion lists in NAV version 4.0 - I've tested this procedure on version 2000 and version 2001, but not 4.0.<br><br>I'm still working on this - I'll keep you informed as to my progress.<br><br>