Why don’t installed patches show on the Patch Rollback page?
Microsoft codes some patches to include an uninstall command, but many (perhaps most) do not include this information. Only those patches that include this uninstall information support the Patch Rollback function. It is often the case that, even when a large number of patches are installed, few – if any at all, will be support rollback. This is purely related to the way that the patch is coded and the information provided by Microsoft regarding the details of the patch.