Windows XP Service Pack 3 (KB936929) to update the connection why …

After the installation of a significant connection error 678

This shows that you are not genuine, of course, are prohibited from .678 is a long-range server does not pick up .Do not update! As long as can be on the line! CMD in the window, enter the command:ping 172.19.37.126 (enter your network gateway), if a ping fails, then the general circumstances of your computer has not deceived, if returned to Request timed out while a general description of your computer deceived .But even if a ping-but still may be subject to ARP to deceive;
If a ping-step, but still not on the net, then please CMD in the window under the Gateway of input commands static binding:
arp-s 172.19.37.126 00-e0-fc-59-ef-68
attached:Tips, removed by hand each time static binding.
Windows Vista and Windows XP dual system may be unable to access the Internet Problems, problems that the general has nothing to do with the dual system, the issue should appear in the TCP protocol inside.
First into the command-line mode, type CMD, at the command prompt enter “ping 127.0.0.1”
to determine the TCP / IP protocol installed successfully, the General does not re-install TCP / IP protocol, if the General to enter the next step.
Enter “ipconfig” to obtain local IP address and gateway addresses, through the “ping local IP address” to determine Is there any problem with the network card, if the barrier Ping sense, you need to re-install the network card driver, if the General to enter the next step.