When I first bought the computer, everything is new, as long as the connection speed guaranteed, then the speed is very normal, but over time, the computer will be used more and more slowly, in the end is what causes of slowdowns of your computer?
Broadcasting storm caused by a network hardware failure which led to slower speeds as the main means to find unknown devices, radio plays a very important role in the network. However, with the increase in the number of computers on your network, the number of broadcast packets will increase dramatically. When the number of broadcast packets reaches 30%, network transmission efficiency will be decreased significantly. If a network card or a network device is damaged, will keep sending broadcast packets, causing the broadcast storm, so that network traffic came to a standstill. Therefore, when network device hardware failure can also cause slower speeds. When such failure is suspected, the first replacement method can be used to replace hubs or switches to excluding hub malfunction. If there is no failure, turn off the hub or switch is powered, under DOS using "Ping" command a computer one by one test involved, to find computers with the malfunctioning Intel network adapter, replace the new NIC Internet connections were restored to normal. Network interface cards, hubs and switches are the most prone to the disease caused by slow speed device.
A port from a network formed a bottleneck leading to slower speeds in practice, WAN port and a LAN port of the router, switch, hub, port, and the port server adapter may become a network bottleneck. When the speed is slow, can we use the network during peak hours, use network management software to check routers, switches, servers, data flow ports and Netstat commands available statistical data for each port traffic. Make sure network traffic bottleneck location, sought to increase its bandwidth. Many specific methods, such as replacing the Server NIC to 100M or 1000M, install multiple network cards, divided into more than one VLAN, change the router configuration to increase bandwidth, can effectively relieve bottlenecks in the network, you can maximize data transfer speed.
Worms leads to slower speeds through E-mail circulated by the increasing impact of the worm virus on the network speed and destructive. The virus causes infected users constantly sliding as long as an outgoing message, select users PC viruses in a document appended to the user of the machine address book randomly random addresses on the message sent. Hundreds of thousands of such spam messages sent out in a line, some was returned to heap on the server in a batch. Individual backbone Internet caused significant congestion, speed became slow, LAN close to paralysis. Therefore, we have to upgrade the anti-virus software; computer you want to upgrade, install system patches in a timely manner while uninstalling unnecessary services, close unnecessary ports to improve the safety and reliability of the system.
Overuse of the excessive use of the firewall the firewall can also lead to slower speeds and approaches do not have to say any more, uninstall unnecessary firewall is only one powerful enough to.
Loaded system resources you may have too many applications running in the background, and proper loading software or remove unwanted programs and files, resources in order to achieve the purpose of increasing speed.
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