I did a quick install of windows (last year I think?) and it sorted everything into a onedrive folder. documents, pictures, videos, downloads, all that stuff, looked normal from the file explorer, but was sneakily placed into a onedrive folder. it went something like c:/users/me/onedrive/. didn't realize what it had done until like 2 days later and it gave me some popup about not being able to upload. i don't even have a onedrive account; it just decided that was how it should be done. no idea what, if anything, it actually uploaded.

now if i have to install windows i have a script from privacy.sexy i run before doing anything else. havent had that happen again yet. still, probably best to assume anything on a windows machine is not private.