In DOS prompt:
- Type cd c:\windows\system32
- Type cscript \windows\system32\slmgr.vbs /ato
If client was once logged in successful at an earlier time then unsuccessful at a later time, it appears that client’s IP address has been added to the IP lockout list due to incorrect login attempts. Client is trying to log in as “anonymous”, which is not a valid user. This could be when client attempted to connect using Windows Explorer or Internet browsers.
For best FTP connection: use FTP client
Remove IP address from the Lockout List.