While on a project to update the Sophos Enterprise Console from version 5.2 to the newest version 5.5 I ran into a nasty problem. The Sophos installer will update all components, including the database if its hosted on the same server, and all seemed to go well. ​ There was however a snag when the installation procedure tried to install the management console MSI, and rolled back the installation: The rollback resulted in the following message and got me absolutely nowhere. T