能登qq不能上网问题（QQ can not access the Internet problem）.doc

能登qq不能上网问题（QQ can not access the Internet problem） First, the network settings of this problem more, appeared in the need to manually specify IP, gateway, DNS server networking, and the use of proxy server Internet access. Check your computers network settings carefully. Two, DNS server problem when IE is unable to browse the web, the first attempt to use the IP address to access, if you have access, then it should be DNS problems, the problem may be caused by DNS for DNS error when networking or DNS server itself, then you can specify the DNS Service Manual (address is the address of the DNS server and you can also use ISP to provide local other places can normally use the DNS server address. In the attributes of the network (in the address of the DNS server control panel - network and dial up connections - local connection - right property - TCP/IP protocol attribute using the following). Different ISP has different DNS addresses. Sometimes its a router or NIC problem that cant be connected to ISPs DNS service. In this case, you can switch the router off for a while, or reset the router. Another possibility is that the local DNS cache is having problems. In order to improve the website access speed, the system will automatically have access and access to the IP address of the site into the local DNS cache, once again visit this site, is no longer directly through the DNS server from the local cache to remove the DNS IP site visit. Therefore, if the local DNS cache problem occurs, it will cause the site to be inaccessible. Ipconfig /flushdns can be executed in run to rebuild the local DNS cache. Three, IE browser itself problems, when the IE browser itself failure, will naturally affect browsing; or IE malicious modification damage will also lead to unable to browse the web page. Then you can try to use the Internet assistant IE repair experts to repair, or re IE (see the IE reload skills) four, network firewall problems if the network firewall is set properly, if