Popular programs like winrar, and z7ip can unpack executables contents at times. The themes from Microsoft's site are not executables, and those are. These also can be unpacked by the same programs to extract the files contained.
»windows.microsoft.com/en-US/wind ··· s/themes--
I distrust those people who know so well what god wants them to do because I notice it always coincides with their own desires- Susan B. Anthony
Yesterday we obeyed kings, and bent our necks before emperors. But today we kneel only to the truth- Kahlil G.