Paba is right
since the client cant communicatie anymore with the ADNM server, it can not tell that it is installed, thus the endless state of processing (its mentioned in the manual too i believe).
Its not a bug, its a feature
the only way you can quit the processing status is to select the task and stop it manually (after ofcourse making sure the uninstall was completed)
The only thing i can think of right now for ADNM to check if the product is uninstalled is to do a check
on the directory that is set in the installation package which was deployed on that computer, if the complete
directory is not present then the package has ben uninstalled, this check should be done after 15 minutes or
so after the uninstall task started giving machine time to uninstall and reboot. If the directory is not present
then the task should be completed and the object labelled as not installed.
thats my 2 cents...