Query: pc's which do NOT have a certain applicaiton installed

Hi,

Please advise on a collection query for pc's which have NOT a certain application installed (and need it).

I used all Windows 7 machines which have NOT the  "display name of application X" but that doesn't have the expected result. It just shows the pc's which HAVE it instead HAVE NOT.

I could use a colleciton which HAS it then exclude it in another collection but would like to do it in 1 collection.

J.

Jan Hoedt