Show hidden files not working in XP:
Here are some easy steps to follw:
1: Go "RUN" and enter "regedit".
2: Go to this key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
3: Here find "hidden". Double click it. Now change the value to 1.
Now your hidden files will appear automatically.
NOTE:
After this if you go to folder option to set hidden files to show it , it will not work so if you want to access your hidden files you have to use this method again.