This reason is more common when IP, gateway and DNS server networking methods are manually specified and proxy servers are used to access the Internet. Check the computer's network settings carefully.
Second, the problem of DNS server
When IE can't browse the web, you can try to access it with an IP address first. If it is accessible, it should be a DNS problem. The DNS problem may be an error in obtaining DNS during networking, or it may be an error in the DNS server itself. At this time, you can manually specify the DNS service (the address can be the DNS server address provided by the local ISP, or you can use the DNS server address that can be used normally in other places. ) In the network properties, (Control Panel-Network and Dial-up Connections-Local Connection-Right-Click Properties-TCP/IP Protocol-Properties-Use the following DNS server address). Different ISPs have different DNS addresses. Sometimes the router or network card can't connect to the ISP's DNS service. In this case, you can turn off the router temporarily or reset the router.
Another possibility is that there is a problem with the local DNS cache. In order to improve the speed of website access, the system will automatically store the websites that have visited and obtained IP addresses in the local DNS cache. Once you visit the website again, the IP address of the website will be taken directly from the local DNS cache for access without going through the DNS server. Therefore, if there is a problem with the local DNS cache, the website will be inaccessible. You can execute ipconfig /flushdns in Run to rebuild the local dns cache.
Third, the problem of IE browser itself.
When the IE browser itself fails, it will naturally affect browsing; Or IE is maliciously modified and destroyed, which will also lead to the inability to browse the web. At this time, you can try to use "Huangshan IE Repair Expert" to repair (it is recommended to repair in safe mode), or reinstall IE (if you encounter the problem that IE cannot be reinstalled, please refer to: attachment 1 to solve the problem that IE cannot be reinstalled).
Fourth, the network firewall problem.
If the network firewall is not set properly, such as the security level is too high, IE is accidentally put into the blocked access list, and the firewall policy is wrong, you can try to check the policy, lower the security level of the firewall or close it directly to see if it is back to normal.
Five, the problem of network protocol and network card driver
IE can't browse, which may be caused by network protocol (especially TCP/IP protocol) or network card driver damage. You can try renaming the network card driver and network protocol.
There is something wrong with the intransitive verb host file.
If the HOSTS file is modified, it will also lead to abnormal browsing. The solution, of course, is to empty the contents of the HOSTS file.
Seven, the problem of system files
When the system files related to IE are replaced or damaged, it will affect the normal use of IE. At this point, you can use the SFC command to repair it. WIN98 system can perform SFC in "running" and then scan. WIN2000/XP/2003 tried to fix it by executing sfc /scannow in Run.
Among them, when only IE can't browse the web, and
When it is available, it is often caused by the damage or loss of files such as winsock.dll, wsock32.dll or wsock.vxd(VXD only exists in WIN9X system). Winsock is an important part of TCP/IP protocol, which generally needs to be reinstalled. However, xp began to integrate TCP/IP protocol, and it can't be simply uninstalled and reinstalled like 98. You can use the netsh command to reset the TCP/IP protocol and restore it to the state when you first installed the operating system. The specific operation is as follows:
Click "Start Running", enter "CMD" command in the running dialog box, and a command prompt window will pop up. Then enter the command "netsh int ip reset c:\resetlog.txt" and press enter, where the file "resetlog.txt" is a log file used to record the execution result of the command. This parameter option must be specified, and the full path of the log file specified here is "c: \ resetlog". The result after executing this command is the same as deleting and reinstalling the TCP/IP protocol.
Tip: The netsh command is a scripting tool based on the command line. You can use this command to configure and monitor Windows systems. In addition, it provides an interactive network shell interface. For the usage format of netsh command, please refer to the help file (enter "netsh/?" In the prompt window).
The second solution is to repair the above files. WIN9X uses SFC to decompress the above files, and WIN2000/XP/2003 uses sfc /scannow to repair the files. When sfc /scannow can't fix them, you can try WinSockFix, a repair tool published on the internet specifically for this problem, which can be searched and downloaded online.
Eight, real-time monitoring antivirus software
This situation is not common, but sometimes it is related to real-time monitoring, because the real-time monitoring of anti-virus software now increases the monitoring of web content. For example: KV2005 will make IE unable to browse the web on personal computers (many friends have encountered it). Its specific performance is that IE can't browse the web as long as it is turned on for about 20 minutes. At this time, if the web monitoring of KV2005 is turned off, everything will return to normal; KV2005 cannot be solved after complete reinstallation. Although not every machine with KV2005 installed will have this problem, after all, each machine has different systems and different installed programs. But if IE can't browse the web, you should also pay attention to checking antivirus software.
Nine, infected with the virus.
This situation is often manifested in the prompt in the lower left box of IE interface when opening IE: a webpage is being opened, but there is no response for a long time. View the process in Task Manager (input method, mouse on the taskbar, right click-Task Manager-Process) to see how CPU utilization is. If it is 100%, it can be determined that it is infected with a virus. At this time, if you want to run other programs, it is simply suffering. We need to find out which process greedily occupies CPU resources. When you find it, you'd better write down your name and click Finish. If you can't finish, you should start safe mode to delete this thing and enter the registry. (Method: Start-Run, enter regedit) In the registry dialog box, click Edit-Find, enter the program name, click the right mouse button to delete, and then conduct multiple searches.
There are many viruses. When antivirus software is powerless, the only way is to delete them manually.
Xi。 Unable to open secondary link.
There is another phenomenon that needs special attention: you can open the homepage of the website, but you can't open the secondary links. If so, the solution is to re-register the following DLL files:
In Start-Run, enter:
Registrar of Shdocvw.dll 32
Regsvr 32 Shell32.dll (pay attention to this command and don't lose it)
Registrar of Oleaut32.dll 32
Registrar of Actxprxy.dll 32
Registrar of Mshtml.dll 32
Registrar of Urlmon.dll 32
Registrar of Msjava.dll 32
Registrar of Browseui.dll 32
Note: For each entry, press Enter. You don't have to enter the second command first. After entering these commands, restart windows. If it is found to be invalid, enter it again, this time with a second command.