Sounds like you may have deleted the account, although I'm not sure what version of Windows you're using, so I can't attempt to replicate.

You can try to "Copy" the profile:

1) Create a new user account.
2) Login as an administrator
3) http://www.microsoft.com/resources/d....mspx?mfr=true

Otherwise, since you can see your "ppp" folder under documents and settings, just take ownership of the folder and pull out what you need:
http://www.tipandtrick.net/2008/how-...ders-in-vista/