Windows XP provides a thumbnail view where you can view images in a directory in small thumbnails. When this is done, Windows generates a cache index called Thumbs.db. In theory, this is supposed to be an up-to-date index of the images in that directory, although sometimes the files become out of synch. Deleting the Thumbs.db file will allow Windows to re-index the directory next time you choose Thumbnail view on that folder. But, you can also globally delete all your Thumbs.db files in order to save a little hard drive space. To do so globally, just run a file search for Thumbs.db and delete all the results. Select Search in the Start Menu, choose to search files and folders, search your local hard drives and all sub-folders, then enter the name Thumbs.db and let her rip. When you get the results, just hit CTRL-A to select all, then hit Delete. You’ll need to confirm the action, and hit “Yes to All”.