One, the computer amount that net of my school campus receives use general situation of the computer inside campus net is very large, the computer uses Windows generally to serve as an operating system, and current and popular all sorts of is aimed at Windows system vermian virus indulge in wilful persecution at Internet, it is very important to because the safety of this computer defends,defend with virus. The problem that a lot of users mention is encountered in our routine, involve computer network safety, virus to defend, be necessary to lead an user here how safe, stable use computer. 2, regular meeting of the classics in the process that the user of a few doubt that common user offers is using the computer raises a few questions below, make below brief solve. Why does 1, my computer slow suddenly? Answer: The computer may contract vermian virus, send data package ceaselessly outside. The computer is looked carefully at to whether be opposite with Netstat Can below command clew accord with other machine sends the local area network data bag, basically look to whether send data package toward the 445 port of other machine, whether does examination computer contract vermian virus, can check with the newest software that reduce toxin kill. 2, my computer why does discharge increase suddenly? Answer: The computer may contract vermian virus, medium perhaps trojan program and was installed by others representative. The user can be used " Netstat Can " whether is the computer that the command watchs him gone to other computer sends the local area network data bag. 3, my computer was installed prevent virus software, why to still discover virus? Answer: The likelihood opens the accessory that virus carries in mail accidentally as a result of the user, the likelihood in a few software that perhaps download contains virus program, perhaps did not install countersign as a result of the operating system or administrator countersign is too simple and be atttacked by countersign worm virus, perhaps did not update newest virus in time to define a library. Suggest seasonable newer virus defines a library, for example the virus definition of Norton Antivirus upgrades convenient and quick, and can install upgrade automatically: Click the Liveupdate in Option option, choose Enable Automatic LiveUpdate in occurrence dialog box next. Why does 4, my computer lose a document suddenly, and much an unknown Zhang number? Answer: This kind of circumstance happens at Win2000 operating system more, the computer because the likelihood did not install countersign or countersign causes a system too simply by vermian virus breach, and virus will be automatic an administrator account is added inside your system, and embedded program of a trojan. Or the computer that a few online users on the network pass such File://xxx.xxx.xxx.xxx/c$ command to visit you, if administrator account does not have setting countersign or countersign is too simple, the computer immediately can controlled. Settlement method: Install multiple word of command, change Administrator account name. 5, my computer installed operating system patch (Windows Update) , installed prevent virus software, and also upgrade on time virus defines a file, why was still planted trojan program? Answer: Have a few reasons, because administrator countersign is too simple,the likelihood is, perhaps did not install countersign, bring about be atttacked by countersign worm virus; Because opened the accessory of unidentified mail to bring about,the likelihood is; Because downloaded unidentified software,the likelihood is or the program is brought about. Be aimed at the means of settlement with these the properest questions above is the format changes a system dish reinstall an operating system, otherwise the unwarrantable software that reduce toxin can be killed thoroughly except virus, cannot decide whether the system stays more have back door. Carry on of retrospective appendix intermediary has ill poison of a few kinds of common worm to investigate a method. 3, the software system that computer operating system installs measure to reinstall a computer should according to the following measure: 1, with affirm the starting CD without virus installs Windows98/2000/Xp, had better use pattern of Ntfs file system to change a system dish. Process of 2, installation no longer give uncecessary details, but attention, if of your installation is version of Win2000 Advanced Server, do not choose IIS component please, if you need to use IIS component, after in the system complete installation ends, undertake installing again please. The 3, administrator account that you are in installing a process installs a safe countersign. Countersign sets a requirement: 1) countersign should 8 not less than character; 2) does not include the word in the dictionary, Chinese Phonetic Alphabet that does not include surname; 3) includes the character of a variety of types at the same time, for instance: Write a letter (A, b, c, . .Z) ; Lowercase (A, b, c. .z) ; Number (0, 1, 2, ... 9) ; Punctuation mark (@ , # , ! , $ , % , &... ) after basic system setup ends, 4, system should be installed instantly prevent virus software and upgrade instantly newest virus defines a library, the proposal uses Norton Antivirus software. 5, Windows Update, upgrade in the site of Windows Windows system patch, this site can scan automatically the safe patch that your computer needs to install and newer option, the time of this one need grows a little a few, the updating that the user needs to update Windows to recommend only can. 6, upgrade all commendation after updating, can choose to install firewall software, complete the demand according to him user, disturbed outfit also won't be affected use normally, the proposal uses Norton Security, the user can choose a system to establish firewall regulation automatically. Because firewall regulation is incorrect,some moment can appear cause the problem that cannot send and receive mail, can the hand is moved add regulation of a firewall, because the setting method of the firewall software of different version is different, because this is not here to give out in detail, the main program that the user wants to carry software to corresponding mail client only sets regulation can, allow two-way turnover namely, software meets most firewall establish corresponding regulation according to the application software on the computer. 7, remind, if the user uses the Windows that is Professional edition, after can considering to installing basic system name of Rename administrator account, managing a tool namely, > account management, > below name Administrator again, change the name that says to oneself are familiar with and like, because Administrator is the administrator account with acquiescent system, change conduce to prevent countersign worm easily enter a system. 4, after computer security use common sense is installing whole system, the following problem should note in the process of daily use computer 1, fixed upgrade systematic safety patch, upgrade regularly virus defines a library, can use update automatically. 2, do not open insecure mail accessory easily, for example " .exe " file, ".chm " the file is waited a moment. A few little software on not 3, informal download and installation Internet or program. 4, fixed with prevent virus software testing system to have virus. 5, put out needless service, share e.g. the file, message service is waited a moment. 6, if discover oneself computer is abrupt,slow or discharge is unusual, examine the computer please instantly with Netstat Can command what port is open, whether does the computer send data package to other address. 5, when how avoiding messenger to disturb an user to get online, classics regular meeting encounters screen to shoot a dialog box of message of a few Windows, because user computer did not put out Messager to serve,this is, the method that shut, enter Control Panel, service, choice Messager serves option, after stopping, the choice is banned with. Can avoid those who get these rubbish information annoy so.
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