Warning: Use of undefined constant title - assumed 'title' (this will throw an Error in a future version of PHP) in /data/www.zhuangjiba.com/web/e/data/tmp/tempnews1.php on line 152 电脑病毒知多少
- 分类:win8 发布时间: Warning: Use of undefined constant newstime - assumed 'newstime' (this will throw an Error in a future version of PHP) in /data/www.zhuangjiba.com/web/e/data/tmp/tempnews1.php on line 156 2013年03月16日 00:00:00
【电脑病毒】计算机病毒是电脑安全性中的一个特殊问题。计算机病毒是一些人蓄意编制的一种寄生性的计算机程序。他能在计算机系统中生存,通过自我复制来传播,在一定条件下被激活,从而给计算机系统造成一定损害甚至严重破坏。这种程序的活动方式与微生物学中的病毒类似。所以被人们形象地成为计算机病毒。但是,与生物病毒不同的是,所有计算机病毒都是人为制造出来的一旦扩散开来,制造者自己也无法控制。计算机病毒的传播途径有软件exe/U盘中毒/网页病毒等。
它不但是技术问题,而是一个严重的社会问题,计算机病毒有如下几个特点:破坏性,凡事软件能作用到的计算机资源,均可能受到病毒的破坏。隐蔽性,大多数计算机病毒隐蔽在正常的可执行程序或数据文件里,不容易被发现。传染性,计算机病毒通过修改别的程序,吧自身的拷贝包括进去,从而达到扩散的目的。这是急啊u树年纪病毒最可破的一个特性。潜伏性,计算机病毒可能会场时间潜伏在合法的程序中,遇到一定条件,他就开始传染,或者激活其破坏机制开始进行破坏活动,这成为病毒发作。
计算机病毒的危害很大,例如,它可能破坏文件名,文件内容,造成磁盘上的数据丢失,它可能删除系统中的一些重要的程序,是系统无法正常工作,甚至无法启动,它 可能修改或破坏山区,减少磁盘的可用空间,它会占用计算机内存,造成计算机运行速度降低,等等。总之,计算机病毒都有危害,不同的病毒知识在方法上,程度上有区别而已。计算机燃油计算机病毒后有一定的表现,了解这些表现有鲤鱼及时发现病毒,消除病毒。目前,常见的表现有,屏幕显示出现异常情况,如出现异常图形,异常滚动,显示的信息不全,显示的信息会突然消失等,系统运行异常,如速度突然减慢,出现异常死机,系统不能启动等。磁盘存储异常,如丢失了磁盘驱动器,空间异常减少,出现异常读写情况等,文件异常,如文件长度无辜加长,文件无故变化或丢失等,打印机异常,如系统丢失了打印机,打印机状态发生变化,无故打不出汉字等,蜂鸣器无故发生等。为确保计算机系统万无一失,不受计算机病毒的威胁,必须做好预防工作。预防计算机病毒的措施有多种,例如,不使用来历不明的程序和数据软盘,确保系统的安装盘和重要的数据盘处于写保护状态并多做备份,启动计算机时内存加载检测,拦截病毒的程序,或在机器上安装防病毒卡,这样,一旦发现病毒就会报警,引起用户的注意。
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