The ultimate solution to Windows7 off line

First of all, if you used to be XP, now modify Windows 7, there is a drop in the phenomenon, then-

The first step, to download and update your network card driver, if the brand machine, to the manufacturer's website to download.
Step two, turn off the IPv6.

In addition, some students said that they will encounter a DNS unresponsive problem, in particular here List Win7 routing Internet DNS server unresponsive problem solution:

The four statements about the symptoms of a problem

Saying one:

1. First you can start-run input cmd, and then enter ping 127.0.0.1

If Ping indicates that there is no problem with the TCP/IP protocol please reload the TCP/IP protocol

2. Then ping your default gateway default gateway to enter Ipconfig/all view ping to explain the routing settings no problem ping impassability should be a routing problem

3. Network Diagnostics say the DNS server is unable to connect this could be a problem with the school DNS server if other students can surf the internet, you have forgotten to change the DNS domain name server to automatic access if the other students are not on the contact school, tell them the DNS server has a problem.

Saying two: (The status of the ARP attack)

Workaround One MS-DOS window after running the command arp-d can be restored to the Internet.

Workaround two First you install the ARP firewall, the second delete c:windowssystem32 NPPTools.dll system files.

Say three:

In fact, the Vista system itself is fundamentally poor compatibility and some system programs have automatic recognition function.

The General Vista system computer will be able to connect the local network and the Internet are normal to use the diagnosis of Windows Network Diagnostics results are unable to communicate with the DNS (server number), while the packet sent and received data also has a certain gap .... Now the general computer maintenance personnel are unable to solve.

When set to an IP address and so on is automatically obtained in the state. Network state is sometimes a connection state. But sometimes it can't be connected ....

These things start to go online for a few days, but after a while you can't even connect to the Internet. Seemingly similar problems: when the computer appears as "Local only", you use Network Diagnostics for diagnosis and repair to see if this problem has been repaired? When no longer go to the host on the IP on the reset, and then on their own computer and then manually set the IP address and so on. And see if it's connected ...

No more. You can call the brand computer after-sale maintenance staff to give some guidance.

Saying four:

The system takes more security into account, your IP is set to get it automatically, it is actually getting IP and related parameters from the DHCP server, but this process may not be completed for some reason. In the SP1 era, in this case, the operating system in order to prevent the network (Microsoft wrote this), the way to set the network card 169.x.x.x reserved IP, do not make any error prompts, if more than one computer does not get the correct IP, then they can also communicate with each other through the reservation address.

However, after installing SP2, the operating system, based on the principle of "safe" supremacy, does not allocate any IP, disconnects the network, and reports the error "Local connection is restricted or connectionless".

The general situation is that the network card can not be binding IP, sometimes repair can be resolved, but many times the repair is not working, the reason is more complex, is generally caused by the network, and the system or the computer itself does not have a relationship, now enumerate the method of troubleshooting:

Ii. 8 ways to resolve and troubleshoot

Method 1:

Open Control Panel-Network connections, locate the current local connection, right-click it, select Properties, double-click Internet Protocol (TCP/IP) on the General tab, select "Use the following IP address", and in "IP address", fill in "192.168.0.1" in the " Subnet mask "255.255.255.0", others do not fill out, and then click "OK" to resolve the problem. (If the current computer joins a workgroup or domain, it will be set according to the situation.)

Method 2:

You can remove the "Notify Me without connection" option in the "Local Area Connection" setting of "Network Connections".

Method 3:

Control Panel, management tools, services

Set the DHCP Client service inside to Automatic

and start the service.

Method 4:

Disable the NIC and enable it.

Method 5:

1, install a network express or star Speed software (Telecom installation ADSL to you when you, or on the Internet to download) on the line.
2, if you do not install dial-up software can also be, you need to create a dial-up connection, the specific how to do on their own try it. Anyway, there are not many forks ...

Note: I remember as if using ADSL Internet, no dial before the connection is normal, the IP address should be 169 ... Private address, but as long as you dial up it will be normal ...

Method 6:

IP becomes 169 (show connection restricted) What's going on?

This IP is an IP address that the system retains for itself when the Windows system makes a request to the DHCP server without responding. That is, when your address becomes 169, because there is no successful connection with the DHCP server, there may be several first possible reasons for the network cable is not connected, although the physical display of a successful connection, but actually the data is not run. The second is because the firewall is blocking communication with the DHCP server, you can check the firewall rules or shut down the firewall. The third reason may be that the network card of the host computer has a total of 0 MAC addresses. You can try reinstalling the NIC driver to resolve it. The fourth reason is that if a dormitory has such a situation to check whether the main line of dormitory connection is normal, the first is the physical connection to the wall at the end of the cable corresponding to the switch is the light. The second is to check their own switch is not a problem, the simple way is to find a cable from the wall directly to the computer to see whether the Internet.

Here again a simple judgment is a hardware problem or a software problem method, manually specify a same dormitory other people are using the IP of the computer, if the other side and they are prompted conflict so that is the software reason. Then check the firewall and host settings, especially if the DHCP service is started. If you don't prompt for a conflict, that's the hardware. Check the network cable physical connection network card and so on.

Method 7:

This occurs mostly because the routing device does not have DHCP enabled, and the default setting for the system is to automatically obtain an IP address, so that when IP cannot be automatically obtained, a "local connection restricted or connectionless" error message appears. This can occur both in a wired connection and a wireless connection. The solution is to manually set an IP address to the computer, as to set what IP address, subnet mask is how much, how to set the gateway, please consult the network administrator.

1, the specific operation of the radical method is as follows:

Control Panel → network connection → local connection → properties → double-click TCP/IP protocol. In the "Use the following IP address" and "Use the following DSN server address" to fill out your address. In general, the corresponding input to the following can be resolved:

IP Address: 192.168.1.2

Subnet Mask: 255.255.255.0

Default gateway: 192.168.1.1

DNS Server (primary): 202.102.192.68

DNS Server (Vice): 202.102.199.68

2, the symptom method, if feel the above setting trouble that also does not have the relation, the hint removes can, has no influence to the network.

The specific actions are as follows:

Control Panel → network connection → local connection → properties → Remove the hook in front of "Notify me when this connection is restricted or unreachable."

Method 8:

First check the network cable by your phone line to the cat, and then to the router (if there is, hehe) and then to the computer is connected to the normal, the most important thing is that your crystal head is a professional do (if the crystal head has a problem, big trouble). If there is no problem, in the computer uninstall your network card, in the Device Manager to restart operation, refresh, is to detect hardware changes! Check to see if your local connection is normal. If still exclamation point, you dot local connection right key attribute, first point tcp,ip at point attribute. Then click the following IP address:

Enter IP address: 192.168.1.100

Subnet Mask: 255.255.255.0 default gateway: 192.168.1.1

Then point, use the following DNS server address input: 202.101.103.55

Finally see your local connection, or the Internet to try, if not, you change a network card, it is possible that your network card is the motherboard integration of the bad.