For LAN problems, please consult a computer expert

It is recommended that you make a batch file for DOS and enter it in cmd (arp -s gateway MAC address).

ipconfig all or netstat -n can see the MAC address of your gateway.

3.Rename the order, change the txt of the text file to bat

4.Put this file in C: Documents and Settings Administrator Start Menu Programs Start Just copy the file here, this will prevent ARP cyber attacks, which will cause your network to be very slow.

The above is one, and if the network speed is still slow, there may be someone in your LAN who uses P2P network terminators, you search on the Internet, there are a lot of anti-network terminator software. If you follow the steps of that software and install it, maybe your internet speed problem can be solved. If you still have a problem, you can **and me**.

I didn't say exactly what the attack was. You can't let others not attack you, you can only protect the system, so that the attack can't damage your system.

1。Refers to the firewall prompting that the attack is blocked.

If there is a machine on the Internet with a virus, it will attack. The firewall indicates that the attack has been blocked and will not affect the system.

First of all, judge whether the physical connection is normal, whether the green light of the network port is bright, if it proves that the physical connection is normal, if the physical connection is normal, judge down, judge whether the data is passable, under normal circumstances, the yellow light of the network port is flashing, if the data is not connected, you can generally use the way of ping, to judge step by step.

First of all, check your own IP, run -cmd to open dos, ipconfig all to see if your IP, DNS, gateway, is it the same as other computers, if it is different, change it to the same, and then start the ping operation, level by level up ping, gateway, external network address, web page.

The gateway is not through, the biggest possibility is that the IP is not right, or the upper router has made some restrictions, such as binding MAC address, etc., if you can ping the gateway, you can ping the external network address, such as ping, if you can ping can't get through, it proves that your router and the external network connection is not normal, other computers can be on, this should not be ping can't get through, the most ping external domain name, if not, prove that your DNS settings are wrong, can not be resolved normally, if you can congratulate you, You can go online, if you can't go online, you have to check the software on your computer, if QQ itself is a problem, IE itself is a problem, the above is for reference only.