well, i made matters worse...
In one of the retries suddenly the networking worked. I quickly checked if there is an update, and started one, hoping it will fix the issue.
Well, soon after, while it still said "authenticating" I noticed the link led is down again, and it just kept like this.
I tried turning off and on, tried microprocessor rest, nothing - it's now stuck in "update retry" which will never succeed if the networking is down.
any way to stop it? hard reset did not help.