ehrenben, Go to Start>Run and type in:
regsvr32 /i shell32
Note that the spacing is important.
When I right-click on any folder that I have created on my desktop (I have Windows XP), the first option is since a few days: "search...". This means that double clicking on the folder does not open it, but rather starts a "search results" windows. Does anyone know how to return to the normal set-up, namely, that "open" is the first option when right clicking?