Run this registry script, which forces Windows to show so called "superhidden" files:
Copy the contents of the Quote box to Notepad, and save in a location of your choice as Unhide.reg (make sure to save as type: "All Files")
Doubleclick Unhide.reg, and answer 'yes' when prompted to add its contents to the Registry, then restart your computer.
This is only for XP or 2000 systems
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer]
"SearchSystemDirs"=dword:00000001
"SearchHidden"=dword:00000001
"IncludeSubFolders"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"Hidden"=dword:00000001
"ShowSuperHidden"=dword:00000001
then try again
