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The file is used to execute the service COM Surrogate for the applications (that is, svchost.exe, WerFault.exe and iexplore.exe), and support device drivers in the ViewSonic computer.
The file was published at 7/13/2009 4:43:52 PM, and is usually located in C:WindowsSystem32dllhost exe. Once active, the file will occupy 7168 KB of memory usage.
If the memory usage of the file showed in the Task Manager is over 1698265 bytes, then there may be a virus (for example, Constructor:BAT/DBCK or Trojan Program:Win32/AdvancedCleaner) on your machine. This file should be replaced immediately with a clean one.

Note: The Constructor:BAT/DBCK is developed by the author of the website uFlysoft and spreads through installing malware uFlysoft Registry Cleaner.
The file with version 6.1.7600.16385 is shared by the game Flight Unlimited III, the web browser Opera 11.60 and the antivirus McAfee AntiVirus Plus.
If the version number changes and the process is not restored as soon as possible, your computer would receive d3dx9_26.dll missing / not found errors, high CPU / Memory usage, blue screen of death BSoD and the error code 0x206F(A reference to an attribute that is not defined in the schema occurred).
Dllhost.exe vulnerability leads to a total of 16982657168 hits by the Program:Win32/AdvancedCleaner since 7/13/2009 4:43:52 PM in countries and areas such as Uganda, Thailand, Gambia, Seychelles and Luxembourg, said Curtis J Ayers, a website editor in Wakoopa.
How can one fix errors related to the file?
A dll tool is necessary to fix and repair related problems.
How can one avoid issues related to the file?
This application can be easily infected by a virus and spyware; as a result, the CPU and Virtual Memory of your PC can be 50% to 100%.
Another cause of dllhost.exe high CPU / Memory usage is the error in the file ole32.dll or OLEAUT32.dll.
If this kind of error is not fixed immediately, your PC performance will slow down and your computer would crash later; Besides, if you try to start a program then, you are more likely to come across some runtime errors.
You can use either products about system security or repair tools for DLL files to fix and prevent this kind of problem.
How can one prevent related errors with a dll tool?
1. Run DLL Tool on your computer once a week;
2. Repair any missing dll file.
Article Source: http://EzineArticles.com/expert/Jane_Seymor/2212286