Open Indexing Options by clicking the Start button, and then clicking Control Panel. In the search box, type indexing options, and then click Indexing Options. (Or simply open the Indexing Options icon in the Control Panel)
Click Advanced. Administrator permission is required. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
In the Advanced Options dialog box, click the Index Settings tab, and then click Rebuild. Administrator permission is required. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
http://windows.microsoft.com/en-us/windows7/change-advanced-indexing-options
I have listed no other files in the index list than the defaults but I actually UNCHECK the box in the Control Panel-Progams and Features-Turn Windows Features On or Off-Indexing Service. I find indexing to be unnecessary.
Hope this helps.
Grif