no internet connection?

[Wukong]

error 651 is a modem issue.
It happens to people all the time.
There are many reasons, but the perhaps the most common is either a problem with the driver, set-up, or anti-virus.
Possibly it's the setup. In that case, contact the ISP and they will help you do it properly, or have a help and support page that deals with it.
Probably like this - - -
Go into My computer > control panel > modems.
Check correct modem is installed. If not then remove modem > restart computer > re-install modem.
If still getting the same problem > go into control panel > networks > remove dial up adapter and TCP/IP > restart computer
Go back into control panel > re-install dial up adapter and TCP/IP.

Microsoft deal with this all the time, and there is plenty of information plus a Mr Fixit that might help.

Also, you can try here for fair advice. -
http://www.error651.com/