Vista - opening files/folders

If I type the name of a folder or file in the search box of the start menu a
list of folder etc with similar names appear above. Now if I select one of
those with the arrow key and hit the enter button I get taken to an Explorer
window with Search Results in Indexed Locations on the left and a whole lot
of files etc on the right. If instead of using the arrow & enter keys I use
the mouse to click the folder name the folder opens up (which is what I am
after).

In my previous installation of Vista the folder would open even if I used
the arrow & enter keys - is there some way I can make my current installtion
do the same instead of taking me to Search Results in Idexed Locations?

Jan