It could be a windows drivers issue, like an incompatibility between last firmware and Os.
In order to better understand, someone could check if with Kobo uncaged patch problem still appears.
My Kobo Lybra 2 is still on 4.35 version, and remains with it until a serious upgrade will be released.
It's unpleasant that users make brainstorming after pay money for good devices with poor support. Forgive the polemic.
@Quoth, is your calibre full working with Linux distro? On mine Calibre built in reader is missing (Fedora and Manjaro)
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