For a few days I have been unable to update Adobe Creative Cloud (ACC). There is a notification of an available update. But when I try the update fails and I get a message to say "another installer is currently running which must be closed before updating the product. Please close other installers. Error code 87". But I cannot see the other installer in task manager. I have tried repairing and uninstalling ACC but this also fails and I received a similar message about another installer currently running. I am still able to directly access Lightroom Classic and Photoshop - but not through ACC. Can anybody help please. Peter.