Explain to me why Word files that I created on my laptop suddenly turn into a LibreOffice Writer file?

ab
3

Please can someone also explain to me how you can ensure that my Word files are never converted into LibreOffice files again.

Ra

Possibly Do you save wrong.

Fa

I suspect that they do not actually convert, but that LibreOffice (new?) Has been installed and registered as the default program for this file type. That can be changed: https://support.microsoft.com/...0a32e1894d

Gu

Did you choose Open Document Format (ODF) when you set up Word?

And what format do you use when saving Word documents?