In the 'Folder Options' dialog window, click on the View tab.In Windows 7: Click on Organize at the top left, then choose 'Folder and search options'.
Click it then click either 'Folder Options' or 'Folder and Search Options', depending on which one appears. In Windows Vista: The button at the top left (to the left of the Views button) will say either 'Layout' or 'Organize'.In Windows XP: Click on the Tools menu, then Folder Options.Open a folder it doesn't matter which one.By default, Windows hides file extensions that are associated with a program, even if the Details view is used. Other methods, such as looking at the file's icon, can be misleading, particularly when installing content for The Sims. Identifying a file's type is best done by looking at the file extension the part of the file name after the final 'dot'.
