With the continuous development of the computer network and popularization, the computer network has brought endless resources, but the resulting network security problem also becomes very important. The article mainly introduced based on WINDOWS system environment of small and medium-sized network security control and virus prevention and control strategies. In order to secure the safe and efficient operation of all work, to guarantee the network security and normal use of the system. Network security relative to our actual life is indispensable. At the same time, we must always pay heed to the construction of computer network security.
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