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1 crossposts
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Then - when you uninstall their short-lived app - Windows doesn't automatically fall back to the app that handled that format before they foisted theirs upon you.
Even better, Microsoft has introduced a user choice 'protection' driver that prevents non Microsoft applications from changing default file association, forcing you to use the settings.
"I run Windows and it acts like Windows!"
Basically malware imo
none of microsoft's junk can be permanently uninstalled, so it should all count as malware