Windows XP has a stupendously aggravating behavior when first installed where it only searches files that match a certain set of file extensions instead of all the files. In the Windows GUI, there is a way to turn the filtering "feature" off, but we want it to be even easier! So download this .reg file from Chris Sells, a very well-known Windows developer, and run it on your system. Voila - file searching works as you would expect it would.