Hints to analyze Update errors based on Servicing Corruption may be found within the Technet post Advanced guidelines for diagnosing and fixing servicing corruption. Stop: Uninstalling updates quoted as "permanent" bears the risk, that further updates can't be installed due to serious errors like STATUS_SXS_COMPONENT_STORE_CORRUPT – see comments from magicandre1981 here and here. I found this information here (too short) and within a MS-Answers forum thread (post from PhilipdayWF). Only updates with a missing or permanency="removable" attribute are uninstallable via control panel or via dism (Windows 8 and above). The XML attribute permanency="permanent" quotes an update as not uninstallable, while a missing attribute or an XML attribut value permanency="removable" quotes an update as uninstallable. mum files are simple XML files containing information about the update (KB numer, language requirements, restart after installation required and so on – see the screenshot below). mum may be found after installing an update with the folger C:\Windows\servicing\Packages\. mum files (mum stands for Microsoft Update Manifest) shipped whithin a. Sometime a KB article mentions that the update is uninstallable ( see).Ĭontrolling whether an update is permanent or removable is done within.
msu file, while ordinary update packages are quoted as "removable". Microsoft declares such updates as "permanent" within the. Servicing Stack updates are mandatory to install further updates – also installer updates are uninstallable. Some updates are essentials for Windows and are integrated deeply into the system. Why and how Microsoft makes updates uninstallable?
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