我用的是诺顿10.0版本的杀毒软件，每次开机以后硬盘指示灯一直是红的，电脑慢得要死，得要很久才能操作电脑。打开系统进程，发现是doscan程序在扫描系统是否有病毒，占用的了好的cpu和内存。

这个扫描虽然是为了帮助用户发现病毒，但是我可以肯定机器里没有病毒的情况下他还是扫描，浪费了大量的资源。

那如何关闭这个进程呢？仔细搜索，看到symantec官方已经有了解决办法。网址如下：http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2005042710304248?Open&src=w

Question/Issue:

You installed Symantec AntiVirus Corporate Edition 10.0 or Symantec Client Security 3.0. After you restart the computer, you notice that the process DoScan.exe is using a large amount of CPU and memory. After the DoScan.exe process completes, the Rtvscan.exe process is using about 40 MB of memory.

看了这段说明，原来是安装的版本是诺顿企业版10.0或security 3.0存在的bug.

This problem is fixed in Symantec AntiVirus 10.0.1 and Symantec Client Security 3.0.1. For information about how to obtain the latest build of Symantec AntiVirus or Symantec Client Security, read Obtaining an upgrade or update for Symantec AntiVirus Corporate Edition or Symantec Client Security.

官方已经在10.0.1版本解决了这个问题，装一个官方补丁就可以了。

Workarounds

You can prevent the creation of the startup Quick Scan on new Symantec AntiVirus clients by importing a registry file. Follow the directions that apply to your situation.

To remove the startup Quick Scan on Symantec AntiVirus clients

• Stop any scans that are currently running, and then download and import the RemoveStartScan.reg file.

To prevent the creation of the startup Quick Scan before installing clients

• Before installing or migrating managed clients, download and import the PreventStartScan.reg file onto each client.

大家只用点击上面的红色字体的链接，下载安装就可以了，已经安装客户端的只用装removestartscan.reg就可以了。