Whether the network is open or not, why can t the Internet be connected?

Clean up the cache of your computer, and put IE Properties->Internet Options->Click Settings in the Internet Temporary Files->View Files-> select the upper directory to open the window, there is a temp folder, and delete all the files in the folder! That's it.

QQ is good, which means that the network is good, and the focus is on the browser.

Try it with a tool to fix it, let's say 360 Security Guard.

Install XP, 98 is for rural people.

According to what you said, your computer is fine, the network is fine, there is only one problem, which person did you offend, that person ordered a software to disable you, so that you can't access the Internet, .

There is a way, you say that you can go downstairs, but you can sometimes go up and sometimes you can't, then you might as well take the machine downstairs and put him there. If it does, it means that there is a problem with the line that is routed to your computer.

If this does, it means that one of the users in your shared route has opened a piece of software to disable you. If you don't believe it, you can try.

Hehe,The motherboard comes with a network card to be seen,Hehe,Remotely set a fixed IP address,It is estimated that it is caused by not assigning an IP。

It's got a virus, and it's changed your system

Hello dear, the broadband link is not working? First of all, make sure that the ADSL modem dial-up is normal or that the physical chain between the network cable directly connected to the home and the switch is unobstructed, because the IP automatically obtained by the NIC is not cleared, so the NIC cannot be obtained when dialing again. If you are a direct network cable to the home, you can disable the local connection, right-click the local connection after enabled, select the age mode, check whether the receipt and send delay is normal, and check whether you can obtain a valid private IP

If the first step is invalid, then disable the local connection (NIC) with ADSL Modem disabled, restart the computer, then enable the local connection (NIC) and then turn on ADSL MODE....If the above steps cannot be solved, check whether the NIC light is on, and if the power light flashes, check the power supply and modem itself; If the external line indicator is still flashing, you can check the indoor line by yourself; If the NIC light is normal, step 1 and 2 cannot be solved, lead the user to uninstall the NIC driver and reinstall the NIC driver.

Hello, your analysis is also reasonable, and you also have to see if the router has changed the IP.

If the mobile network is not available, you can test it from the following points:

1. Check whether the SIM card is inserted.

2. Whether the mobile phone is in arrears and is shut down.

3. Whether the airplane mode of the mobile phone is turned on by mistake.

4. Whether there is a sudden network failure at the location.

5. Whether the SIM card is damaged.

Corresponding workaround:

1. Plug and unplug the card again, and log in to the network after booting.

2. Check whether the mobile phone is in arrears and shut down through the network hall and mobile hall.

3. Turn off airplane mode.

5. It is recommended to bring valid documents to your own business hall to re-replace the card.

There are often network failures, just as people often get sick, and the most important thing is not to be anxious and keep a clear head after the network question.

Find out where the doubt is, then there are the following situations:

1. When the entire network is always unreachable, it may be a question about the switch or hub, depending on whether the switch or hub is working normally.

Second, only one computer network is not connected, that is, when you open the network neighbor of this computer, you can only observe the local computer, and you can't see other computers, it may be that the connection between the network card and the switch is in doubt, when you want to see the RJ-45 crystal head in the first step is impossible to contact badly.

Next, use a line tester to test whether the line is broken. Finally, check that the ports on the switch are working properly.

3. You can't observe the local computer in the network neighborhood, or open the start of the run, use the ping command to ping the IP address of the local computer, it means that your network settings are in doubt, when the first step should be the network card, you can open the control panel system device management network adapter settings window, in this window to check whether there is an interrupt number and IO address conflict, then in this case, the NE2000 series network card is IRQ3, and the network card of the 8029 chip is IRQ10.

If you find that the network card is conflict-free, the next step is to check whether the driver is in good condition, and then reinstall the driver of the network card.

4. You can observe other computers in the network in the network neighbor, but you can't access them, when it may be that your network protocol settings are in question.

Uninstall your previous network protocol, reinstall it, and set it up again.