Hello!

I'm having trouble connecting to my VPN with one system.  My other systems
on the same network connect without any problems to my work VPN, however, one
system does not.  It won't connect to ANY VPN.

Upon connecting, I get "Registering your computer on the network...", then
"Error 720: A connection to the remote computer could not be established. 
You might need to change the network settings for this connection."

I've tried manually selecting the protocol, doing the TCP/IP stack reset
through NetSH, deleting the connection, removing and reinstalling TCP/IP on
the connection, etc, to no avail.  Help please!  I need this connection to
work.

I'm running XP SP2, no firewalls other than the Windows firewall and using
Symantec Enterprise AV.

I would check the protocol settings first. these search result may help,

VPN error 720 Symptom: When attempting to establish a VPN connection to Windows RRAS, you may receive the following error message: Error 720: No PPP control protocols ...
      www.chicagotech.net/VPN/error720.htm 


Error registering your computer Error 720: A connection to the remote computer could not be established. ... Error 682 Error 691 Error 711 Error 720 Error 721 VPN Error 732: The PPP ...
      www.chicagotech.net/vpnissues/vpnerror720.htm 


VPN error code VPN Error 720 - No PPP control protocols configured · VPN Error 720 - A connection to the remote computer could not be established ...
      www.chicagotech.net/vpnerrors.htm 



Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
  I'm having trouble connecting to my VPN with one system.  My other systems
  on the same network connect without any problems to my work VPN, however, one
  system does not.  It won't connect to ANY VPN.

  Upon connecting, I get "Registering your computer on the network...", then
  "Error 720: A connection to the remote computer could not be established. 
  You might need to change the network settings for this connection."

  I've tried manually selecting the protocol, doing the TCP/IP stack reset
  through NetSH, deleting the connection, removing and reinstalling TCP/IP on
  the connection, etc, to no avail.  Help please!  I need this connection to
  work.

  I'm running XP SP2, no firewalls other than the Windows firewall and using
  Symantec Enterprise AV.

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