When you are logged on as one user (such as Administrator), and you try to run a program as a different user, you may experience the following symptoms. If you try to run the Command Prompt program or the Notepad program) as a different user by using the Run as feature, you may receive one of the following error messages:
C:\Windows\system32\cmd.exe The directory name is invalid.
C:\Windows\system32\Notepad.exe The directory name is invalid.
To use the Run as feature, you click The following user in the Run as dialog box, type a user name in the User name box, and then type a password in Password box.