Win 7? If so, Microsoft has a bug. As you go through the process, when you get to the step where "SCENERY" is showing as a folder, don't click on the word Scenery (as you normally would). (Normally you would click on "scenery" then "ok". ) Instead ... Click on the OK, then click on the white space in the box ...DO NOT on the word SCENERY. It will then work.
D