Hi and welcome to the Forum 
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I found most of the files from Microsoft with the desktop variant Mate / Cinnamon. Over 200 MB of Microsoft clutter that can only be deleted with admin or root rights. As a simple user, you have no chance of throwing the junk off the disk if you don’t want to have it or use it.
Can you be more precise about which files you needed to delete exactly?
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Können Sie genauer sagen, welche Dateien Sie genau löschen mussten?
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