![]() Programmer the trouble of doing it himself. Some installation packages are created by a standard installer, with the additionalīenefit that it automatically creates the uninstall program, so saves the It is deficiencies in the uninstall program that cause leftovers. Only runs the uninstall program that came with the product. The problem here is not inherent to Windows, which actually for desktop products This was indeed the case for every Windows version that ever existed. They are always installed per-user, and Windows creates a dedicated registry hive for each "Store" app, so whenever you uninstall the app it can simply delete the entire hive, with all registry entries ever created. That said, most of those problems have been solved by "Microsoft Store" app packages – they're self-contained as much as possible. (That's not just a technical limitation – I think most people would be quite against their files getting mysteriously removed because another person uninstalled something.) ![]() The same program might be used by multiple users on the same computer, and the user uninstalling the program does not have permissions to read and write all other users' profiles. Many users uninstall a program just to reinstall a different version afterwards, so removing all associated data would cause preferences and everything else to be lost. ![]() Windows doesn't know which entries belong exclusively to the application, and aren't being shared between multiple apps. Windows does not know which entries belong to the application even for HKCU\Software all it has is the name (which might be slightly different or even completely different). ![]()
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