Because XP will not always show you hidden files and folders by default, Go to Start > Search>Files and Folders>> and under "More advanced search options".
Make sure there is a check by "Search System Folders" and "Search hidden files and folders" and "Search system subfolders"
Next click on My Computer. Go to Tools > Folder Options. Click on the View tab and make sure that "Show hidden files and folders" is checked. Also uncheck "Hide protected operating system files" and "Hide extensions for known file types" . Now click "Apply to all folders"
Click "Apply" then "OK"