that's unlikely to help. the problem will go away if you connect via a cheap unpowerd USB hub - and Windows will be using the same drivers - its not a driver issue.
my own Kobo Aura HD works every time when connected via a HUB and not at all when connected directly to a USB port. [ just like for you - the device says connected but it is invisible to windows and thus invisible to any Windows app, like calibre ]
(all my other USB devices work on all ports so its a Kobo bug , but Kobo are determined to pretend the problem does not exist )
Searching older threads here will confirm it happens for many users with several different Kobo reader device models and with several different versions of Windows
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