Do you have any mapped drives on your system? If so, make sure the "reconnect at logon" boxes are unchecked.
If the machine is joined to a DOMAIN make sure DNS is all setup properly on the laptop
You can try to disable the NLA (Network Location Awareness) service
cant think of any other things to try.
Also, if you still have remains of old Novel stuff on there you need to get rid of it. The Novel client is notorious for causing login issues.