Hello dear friend,
This problem occurred to me a few weeks ago the 3 points I describe you I worked 2 .
1. You must have QlikView Desktop Bachelor if you use it .
2. You must uninstall all Server, Engine , Designer, Rabbit and you Postgrade SQL machine and reinstall in order.
3. Remember that the name of the machine must be equal to your PC without domininio .
I hope it helps you