This is a customizing tip. If you want to customize your windows explorer search here are some tips. In regedit, navigate to [HKEY_CURRENT_USER\\Software\\Microsoft \\Windows\\CurrentVersion\\Explorer]

and look for following keys "CaseSensitive"

"IncludeSubFolders"
"SearchHidden"
"SearchSlowFiles"
"SearchSystemDirs"

Key names are self revealing. If you want a CaseSensitive search set its value to 1 else 0. This is the technique, if you prefer to enable any of the above feature, set its value to 1 else set it back to 0.
IMPORTANT DISCLAIMER: Before doing anything with registry, It is very important that you take a backup of registry by exporting it. Remember even a minor mistake in registry could render your system unusable or will cause it to stop or crash. XPTOOLS is not responsible for any such damage that may occur directly or indirectly as a result of your applying these changes. Don't try it if you are not sure. Use at your own risk