Instructions for vista http://www.bleepingcomputer.com/tutorials/tutorial130.html
Use the operating systems search facility to search for names.
For Windows XP
1. Go into your Control Panel by first clicking on the Start Button.
2. Then click on the Control Panel icon located in the right column of the Start Menu.
3. If your Start Menu is set to the Classic View, then begin by clicking on the Start Button.
4. Then click on Settings, then click on the Control Panel icon to open up the Control Panel.
5. Now, Double click on the Folder Options icon until it opens for you.
6. Then click on the View tab located at the top of the screen.
7. Locate the Advanced settings: window located in the center area of the screen.
8. Then change the Do not show hidden files and folders option to Show hidden files and folders.
9. You can also uncheck the Hide protected operating system files [Recommended] option as well.
10. If you uncheck this, Windows will ask you if you are sure you want to display these files.
11. Simply click on the Yes button to allow Windows to display these protected files.
12. For Windows XP, you can also uncheck the Display the contents of system folders as well.
13. Then click on the OK button to save your changes and exit the Folder Options window.
14. Then close the Control Panel to return back to your Windows session.
15. Windows will now Display all Hidden and System Files on your computer.
Windows 7
http://www.bleepingcomputer.com/tutorials/tutorial151.html