Why Does Rundll32 Disappear?

The rundll32.exe is an essential part of running many applications.

If you pay attention to the function of programs or take a peek at your

 PC's Task Manager application 

from time to time, 

you have surely seen the Rundll32.exe file. 

To understand why the Rundell32 can occasionally disappear

, it's best to first look at what a .dll file is and how it works in conjunction with the Rundll32.exe.

Defining the DLL

1. To begin, a DLL is a Dynamic Link Library file. Dynamic Link Library files are used in many programs. One of the major benefits of using DLL files is that they use fewer system resources and allow for programs to be built on a modular architecture. This allows modules/parts of programs to run and/or be updated independently.

How Rundll32.exe Works

2. Since DLL files cannot launch themselves, they need an application to do that. In Microsoft Windows, the application that runs a .dll is the rundll32.exe. In fact, if you look at the Task Manager program in Windows and click on the "Processes" tab, you may see more than one rundll32.exe file running at the same time.

Problems with Rundll32.exe

3. In some cases, viruses and malware operate under a rundell32.exe file name so they don't look suspicious. If such a program allows access to an outside user, you may notice it running --- or disappearing --- without a recognizable pattern. If you notice any abnormalities with the computer including decreases in performance, crashes or pop-ups, run an antivirus program; there are many antivirus programs available at no cost online. If the problem persists, you may want to contact a professional. If the disappearing rundell32.exe file does not seem to be affecting the computer's performance, however, then it may just be running as it is supposed to run.

Read more: Why Does Rundll32 Disappear? | eHow.com http://www.ehow.com/facts_7569668_rundll32-disappear.html#ixzz17cBCpsSl