NT User Shell

Hits: Failed to execute CGI : Win32 Error Code = 3

Set user shell to transfer control to once user successfully logs onto system.

Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows NT\CurrentVersion\Winlogon
Name: Shell
Type: REG_SZ
Value: Explorer.exe default user shell
Other appropriate shells might be taskman or progman.