Tech tips: How do to add or remove locations from the index
The easiest way to add something to the index is to include a folder in a library. When you do that, the content in that folder is automatically indexed. To learn more about including folders in libraries, see Three Ways to Open Folder Options in Windows 8.
You can also add something to the index without using libraries. To add or remove an index location, do the following:
2. Tap or click Modify.
3. To add or remove a location, select or clear its check box in the Change selected locations list, and then tap or click OK.
If you don’t see all locations on your PC in the list, choose Show all locations. 
You might be asked for an admin password or to confirm your choice. (If all locations are already listed, Show all locations won’t be available.)
If you want to include a folder but not all of its subfolders, select the folder, expand the folder, and then clear the check box next to any subfolder you don’t want to be included in the index. These folders will appear in the Exclude column of the Summary of selected locations list.
Via Microsoft.com
