It can be very annoying when I type say Gimp into Spotlight and it defaults to the Windows version. That causes Parallels to launch, then Windows within that then Windows-Gimp…when all I really wanted was Mac-Gimp. So easy to type without looking!
The solution, from the following weblink, is to open up Mac’s [SystemPreferences > Personal > Spotlight > Privacy] then drag the VM folders there (I assume this simply creates references to those folders). The VM folders are to be found, from your root directory, [Applications > Windows 7 Applications] (say).