I had systems with an update which should be uninstalled because of an incompatibility.
Yesterday I configured the updates on wsus to "not approved" and ran the uninstall as update management task using the patchmanager console and asked the users to restart their computers after successful uninstalls.
But today, the update is installed again. windowsupdate.log said the install occured at shutdown yesterday evening (the systems where restarted before approximatly at 1:00pm yesterday (after uninstall) and shut down at 17:00pm).
What did I wrong to uninstall cleanly?