We pushed out a .exe file and it was supposed to have been silent, but we found out the clients were having to go through the GUI install window. So we deleted that task in the console and created one using a .msi. That seems to be working fine for those clients which somehow didn't get the .exe task sent to them. However, those that did are not letting the .msi file run due to the error in the subject line. We thought that the install was somehow stuck running as a background process and a reboot would fix that, but it has not.
How do we clean up the references to the .exe task so that the .msi task can complete successfully?