The question of connecting computers to the network is an extremely complex one

Your problem is similar to mine, I have 2 laptops, one XP SP3 and one Win7, connected to the D-Link wireless router through Huawei cat dial-up, and both computers are connected with wireless network cards.

Set the number of concurrent connections, limit the speed of Thunderbolt, limit the thread, set the rate of the network card, set the channel of the route, transmit power, etc., without any effect. Upgrading the routing firmware and cooling down with a fan is also ineffective.

In the end, there were many experiments, and it was found that the fault was related to the compatibility between the three factors.

1. Encryption methods of wireless routing, including WAP and WAP2-PSK.

2. The operating system used, XP SP2, XP SP3, Win7

3, Thunderbolt's version, and.

Note: XP SP2 must be patched to use wap2-psk encryption, and my original SP2 is not patched.

xp sp2 + wap +

win7 + wap2-psk +

xp sp3 + wap2-psk +

XP SP3 + WAP2-PSK + Problem solved after upgrading Thunderbolt).

There are other combinations that have not been tried. In addition, some people say that you can solve the problem without using Thunderbolt with other ** tools, but I haven't tried it. Some people also say that it has something to do with routing, because there is only one route, so it can't be verified.

I hope the above can help you.

First change the system to see, or just use a system to see, also, right-click on My Computer, Properties, Hardware, Device Manager, click on Network Adapters"+"right-click on Properties, Advanced, and see if the Speed Duplex Settings is set to Auto Negotiation.

If it doesn't work, get a new cat to take a look.

Error 678 means that the network is not working, it is a network cable problem, and it has nothing to do with your computer.

Telecommunications. If you change to a cat, if that doesn't work, find the service company where your network is located.

You change the cat to try first, if it doesn't work, continue to find a telecommunications company, your machine is fine, it's a network problem.

Let Telecom change the box for you.

Poor network connection or poor regional signal, etc.

3. Open IE, click Tools, click Internet Options, click Delete Files, click Clear History, OK, Save, Exit IE, and Reopen IE.

I've tried all three of the above methods, but it doesn't work, look at the following.

Three possibilities:1Internet speed issues.

2.Virus issues.

3.Problems with the speed of the computer configuration.

Here are a few workarounds:

1.Check for viruses in safe mode, 2Or reinstall the browser to see if something similar happens.

3.Try a different browser.

4.Try it with a different computer to connect your network cable, and if something like this happens, it's your internet speed problem.

5.Last resort. Repair the system.

If the landlord says that it is not the above problem, then it is possible that someone has controlled your internet speed with a P2P terminator, and if so, you can take two ways to solve it:

2.Use 360 antivirus software, browser, and 360 firewall to effectively defend against attacks that control network speed.