No geoprocessing tools will open in new 10.2.1 install from search window

[JakeJacobs]

Just installed 10.2.1 on a brand new Win7 64bit machine.  In both ArcMap and ArcCatalog, I can't open any geoprocessing tools from the search window. 

If I go to the search for tools and search for one, say, clip, I can see the list of tools.  I can right-click on it and see "Open".  But neither clicking nor choosing "Open" does anything.

If I open the toolbox window and navigate to a tool and right-click and choose "Open", it does open the geoprocessing tool's window.

I repaired my install, but that did not help.

The only other ArcGIS product I have installed on the machine is Diagrammer.

[JakeJacobs]

Brand new machine.  No third party tools.  Brand new install. 

I do also have 64bit background geoprocessing installed as well. 

I did recreate the normal.mxd, gxt, and toolbox.dat and that did not solve the problem.

[MichaelVolz]

Have you tried disabling Background Geoprocessing as it is checked on by default and has been known to cause issues when it is checked on?

[MichaelVolz]

It was definitely an issue at 10.1 and possibly at 10.0 as well.  Since we had it disabled in those versions, we disabled it at 10.2 as well.