You want to prevent installation of Office 2007 onto workstations that have Office 2003 installed already? My understanding of WMI filters (as applied to a GPO) is that if the query returns anything, then (you've got a "true" and) the condition is met, which makes it tricky to negate something like the presence of a product, as opposed to something simple like "has more than 512mb of RAM". --If I'm wrong, please, pretty please shed some light here!!! (I beg of you!) Another thing you could do is use/create an MST onto 2007 that adds an Install Condition making sure there's no other Office version installed before proceeding. Otherwise perhaps basing your query around the Office 2003 Product code might help. f. On Fri, Sep 26, 2008 at 12:16 PM, Thomas Marantz < TomMarantz@xxxxxxxxxxxxxxxx> wrote: > I have an Office 2007/2003 environment. > > I have deployed Office 2007 compatibility pack for Office 2003 > workstations. > > I've been trying to get a Filter to block installation on Office 2007 > workstations, here is what I have… > > Root\CIMv2 > > SELECT * FROM Win32_Product WHERE (Caption LIKE "Microsoft Office%2003%") >