dllhost.exe占用内存过高的问题

首先排除是冲击波病毒，方法很简单，在任务管理器，右键打开文件位置，如果不是在System32文件夹下，就可能有问题了。

如果是冲击波的话，估计删了就好了。

不是的话，两种：

1、删除3D视频，对于3D视频，windows在生成缩略图时有问题。或者打成包也可以。

2、参见这个回答：http://zhidao.baidu.com/link?url=7ApjHY4gPGZ7xldtLvXZgXzgx2xoYqQOrHX81_wKObZanqOUp55J1nDtg5t7L6SsWnKXlX11873uwrr2GEv2G_

       

Hello, Microsoft will not help you with this problem, but I will.
I had the same problem, I solved it completelly and in 2 minutes:
The problem appears when dllhost.exe attempts to create a thumbnail of an mp4 file, but for some reason cannot complete the task, and starts reading the hard drive non stop and filling all phisical Ram, and starts using the swap file (virtual memory file wich uses hard drive space as ram memory), slowing down or freezing the computer.
The cause is probably an error in the integrated mp4 windows codecs.
Anyway, the solution is to download and install a freeware program wich generates all video files thumbnails instead of windows. It even creates thumbails of flash (flv) files!
You can download it from this link:
http://www.free-codecs.com/Media_Preview_download.htm
Or googleing Media Preview 1.3.1.343
After the installation is complete, simply enable all the video files thumbnail  options and done.
Problem solved. You do not even need to restart the computer.
Before you install it you should kill the dllhost.exe if it is running. After the installation, just open a folder or select a file to see the thumbnails generate quickly and without any problems.
If you have the tasks monitor open, you will see the dllhost appear while the thumbnails are being generated, and then it will disappear. It will never exeed 20.000kb.
Done and done.
I hope this helps anyone with the same issue.
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/windows-7-dllhostexe-memory-leak/7147cdab-a29b-4277-9a33-04199095ca01

大意是说明这个问题的原因，然后可以下载Media_Preview_download，通过这个软件来生成缩略图。

方法二未验证，但方法一是没问题的。