After 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.
While it is true that ledger should have this solution posted in their FAQ, this problem is not related to the nano s itself.
It is a problem with the combination of the nano s and windows.
As far as i know this problem does not occur on linux/mac systems. Only windows is affected.
But I must say that after a few hours of having sent a support request I have received from them an email with the correct solution. I had already solved the problem, but this means they are actually supportive. What they would have done, as you say, is to prevent all these losses of time by placing the info in their FAQ.