***Updated July 10, 2013***
Your task: Group all Microsoft Windows computers which are missing Adobe Reader XI.
Create a collection which looks like this.
Note: When using collections where you show computers which don't have applications you want to be sure to account for computers which are in your Inventory DB but have never been scanned. Any computer which has never been scanned looks like it has no applications thus it would be a member of the collection. I like to add the Computer Never Scanned to False in these situations because computers in your Inventory which have never been scanned would otherwise show up in this collection.