We have three Laptops (Win 8) here that were planned to be the production computer and those are the only ones, who can read the SSL feed.
We tried to update all the other computers (laptops and Desktop) to the same standards like the working Laptops, with root certificates, windows updates and all applications.
But no changes.
So now those three Laptops became the DIS and the Desktop Computer have been transformed to be the Production Computer.
But still not found the solution.