I had to reinstall windows and now i lost admin privilege on my server. As the token has already been used, i tried to use Putty, but as soon as i login to the server the Putty black window closes. I don't even have time to do the login serveradmin thing, because the putty windows closes in a couple of seconds.
I also tried to use server query inside the TS client, but it says i don't have privileges for that.
How can i get another privilege key to be admin of my server again?

Thanks in advance.