What are Rundll Errors?

Rundll errors are usually experienced by almost all computer users. They occurs when there is confusion in the DLL (dynamic-link library) command line. To understand Rundll errors, it is important to discuss first the cause of these errors. It all starts with DLL. Basically, DLL files are system files integral to any and all programs written and developed for the Windows environment. These files can be compared to many codecs, libraries with important information, and data and codes used by programs for reasons as simple as it is a necessity to the operation.

DLLs are shared by many different programs. It is considered as a centralized databank that programs can access. What is the reason for this? If every program has its own exclusive language and code, they would singularly operate against one another, hiding information from each other and cause the main system to be extremely slow. DLLs are used by Windows to run many programs and functions. By reusing instructions and codes within these there is greater efficiency and speed.

Now, how do Rundll errors occur?

Rundll errors occur mainly when there is confusion in the command line. Basically, this occurs when Windows attempts to load a DLL file that is not there, which means the inability to locate or find the DLL file a program is trying to launch or execute. In simple terms, DLL have a set of different instructions that Windows listens to, in order to launch applications and programs properly. An error occurs when there is a DLL code or file within a certain file that is missing, thereby causing an error and system crash.

Possible Causes of Rundll Errors

Rundll errors are usually caused by malicious spyware and malware, or even certain virus files that have successfully infiltrated the computer. These pirate executables and programs basically take over the files that are being shared by different rundll applications. Certain malware programs change the structure of shared DLLs, transforming the code lines or causing them to become totally inaccessible. Likewise, Trojan attacks put in fake or rogue .dll files within the Windows system folder, causing the malicious program to further corrupt or infect the .dll library. Rundll attempts to access these .dll files when the applications or programs are launched. The new conflicting .dll instructions, missing code, or missing files can cause the rundll error message to appear and this can result in total system crash.


You can use anti-virus and anti-spyware programs that can mitigate or alleviate the situation. These programs can track down all bad software, viruses, and malware, and delete them totally from your system. However, this is not that effective. What about the damages and tracks left behind? A big part of these faults is actually left in the Windows database. This large database records each and every task happening on the computer. Malware and bad programs, when trying to hijack or change DLLs, leave their traces within the registry. Thus, you need a reliable Windows database optimization and cleaning tool to fully track down all the rundll errors and automatically resolve them.

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