Same shit happening to me - this is a shame, now I cannot access my funds any more, everything is blocked. This is NOT what one would expect from a product like Nano Ledger.
Did you actually check the device manager if one USB-device has a yellow explaination mark beside it?
If so, you simply need to open the properties and 'install the driver' (windows USB-driver; should be done automatically by windows).
If this is not the case: Are you able to access the ledger manager? Or is your nano s completely stuck?
If you really need to access your funds asap, you can simply import your seed into another wallet (e.g. electrum [1]).
But consider your seed as compromised from this moment on. When moving your funds back to the ledger, you should create a new seed.
[1]
https://electrum.org/#homeAfter checking on this thread and solving the driver problem (USB-device with a yellow explaination mark) in fact after a while I have managed to complete the update, and now my Nano Ledger S is fully working again. However, still it is a shame that support of Nano Ledger would not point to this solution in their how-to instructions on their website and we had to come here to find a solution. Many thanks of course to those who have posted the solution here.