In addition to different naming conventions, the behavior of each update can differ wildly. As an example, not every patch can be uninstalled . While this may seem like a trivial detail, having a proper rollback strategy in the event of a critical failure can save a lot of headaches in the long run. Unfortunately, whether or not a patch is uninstallable depends entirely on the version of Windows the patch is being applied to, how the patch was created, and the specific changes the patch applies.