I've destroyed my default folder locations

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I keep my Vista pictures, videos, and music folders on a separate partition. All of these are linked to from my user folder on the Vista parition. However, recently I accidentally changed the drive letter of the partition with the actual folders on it. Since doing this, the shortcuts have dissapeared from my user folder, and the links at the top right of the start menu to absolutely nothing when clicked on. The properties dialogue for each looks something like this... link

Is there anywhere in Vista I can change the default locations of these folders back to their correct ones?

 

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I've tried changing the drive letter back. This seems to have made no difference

 

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Thanks for the advice guys. In the end I just left it for 30mins and when I came back Vista seemed to have 'fixed' itself. The folders had found themselves and all shortcuts were pointing to the new locations