How to Fix ‘Rundll Error at the Startup of Windows’

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Rundll Error

For any Windows user, the Rundll error creates massive frustration. The Rundll error occurs mainly at the startup of Windows XP, Vista, or 7.

If your computer suffers from this error, you will see a specific popup message. This message says something similar to ‘the application did not start properly.’ Sometimes, it can pop up a window saying, ‘the specified module could not be found.’

As a result of this error, you will notice that your computer freezes up. In addition, some might notice that their computer gets incredibly slow due to this error.

Have you ever experienced this error? Do you wonder how to get rid of the Rundll error? If so, this is the article you must read.

This article will teach you how to fix this error and get your computer back to normal.

An Introduction to Rundll

Rundll is a file with .exe format. It is basically a system process that directly connects to the Windows operating system. In general, rundll and rundll 32 files are a vital part of the combination of shared codes.

The purpose of running rundll files is to maintain and increase the operating system’s speed. In addition, it increases the overall efficiency of your computer’s operating system.

That is because it has the ability to run the same code of instructions repeatedly. So, the programs don’t have to process the previous codes repeatedly because rundll executes them.

In fact, this is just a brief description of rundll to give you a quick insight. If you need more clarification, please do some research.


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What is the Reason Behind the Rundll Error?

As you might have noticed, the Rundll error appears when your computer’s operating system starts. In general, this error is caused due to one of the following reasons.

  • A DLL file is deleted improperly
  • An uninstalled application’s DLL is shared with another application
  • A DLL file is infected by malware such as a trojan or a virus
  • Invalid DLL entries appear in the Windows registry
  • DLL files are corrupted

Basically, the Rundll error appears when the corresponding DLL file has undergone some changes or deletions.

Besides, here, you will learn more about how to delete Windows update files.

How to Fix the Rundll Error?

It is usual for any person to get frustrated when they experience this Rundll error. Most novice users, in fact, tend to call for professional help right after noticing such an issue. If not, those with some knowledge opt to remove the corrupted rundll files manually.

If the truth is to be told, getting an expert to fix the issue can cost a considerable amount of money. On the other hand, deleting the rundll files inappropriately can cause irreversible harm for your computer.

But we have several perfect solutions to this and get your computer back into normal mode. The methods are mentioned below for your reference.

  • 01. As the first solution, you should try reinstalling the programs reported to have Rundll errors. If this particular issue appears from third-party software, you should uninstall it and get it installed once again. However, some applications let you have an option called ‘Repair.’ You can also try this option to fix the potential Rundll error in it. The repair feature will try to retrieve the missing or corrupted DLL file and get the software to run again.
  • 02. You can also fix the Rundll error simply by downloading a copy of the same rundll file. This file can be available on the internet, probably for free. In general, most of the rundll files of known applications are available online. Once the corrupted rundll file is replaced, you should perform a restart on the computer. Then, you will have to check if the issue persists.
  • 03. Are you working on a computer network operating on the same OS version? If so, there is another solution to this. Under such circumstances, you can try copying the same rundll from a different computer to the faulty one. Then, you should see if the error is fixed.
  • 04. If the Rundll error has occurred due to a failure caused in the Windows registry, you can fix it. Usually, this happens when you clean the registry, and the dll is dumped with other unwanted files. In this case, you will have to fix the registry errors and remove them all from the registry. In fact, this can be the most effective option to fix this issue.

What Can You Do if a Data Loss Has Occurred Due to Rundll Error?

Well, the truth is that some of the Rundll error situations can even lead to data losses. That is in addition to various other issues when you lose your data. Needless to say, how annoying it is.

If you have lost your important files, you surely have frustration over it. What should you do if you have experienced such an issue and wonder how to recover the lost data? The most effective solution to this is using a powerful tool that can recover lost data from your hard drive.

In this case, we trust software like Recoverit Data Recovery software. Just like the name suggests, this powerful software can recover data in a very effective manner.


Besides, here, you will find the best solution for the invalid value for the Registry.

Features Associated with Recoverit Data Recovery

  • It can recover various types of lost files from your hard drive. Be compatible with images, music, audio, emails, documents, and other file formats.
  • It can recover data safely and conveniently without causing any trouble.
  • Recoverit Data Recovery software can recover data from hard drives, memory cards, recycle bins, camcorders, digital cameras, etc.
  • It can recover data that is lost due to various situations. For instance, it recovers data lost due to sudden deletion, format, virus attack, corrupted hard drive, system crash, etc.
  • Highly user-friendly interface that can be used even by novices.
  • You don’t need a piece of programming knowledge to use this software.

This special software can recover lost and deleted files from formatted partitions. In addition, you can use it to recover deleted files from corrupted hard drives.

Thankfully, it supports all storage devices ranging from SSD to memory cards. So, if you have lost data while fixing the Rundll error, you can easily get the assistance of Recoverit.

Frequently Asked Questions (FAQs)

Q1: What is a ‘Rundll Error’? A1: A ‘Rundll Error’ occurs when a program fails to load a DLL file during system startup.

Q2: How can I identify the DLL file causing the error? A2: The error message usually mentions the specific DLL file that failed to load.

Q3: Can malware cause ‘Rundll Errors’? A3: Yes, malware infections can lead to ‘Rundll Errors.’ It is crucial to run a malware scan to eliminate any potential threats.

Q4: What is System File Checker (SFC)? A4: System File Checker (SFC) is a built-in Windows tool that scans and repairs corrupted system files.

Q5: When should I consider reinstalling Windows? A5: Reinstalling Windows should be considered as a last resort when all other troubleshooting steps have failed to fix the ‘Rundll Error’ issue.


You may go through the options we have provided care for and try them to overcome the Rundll error. If you have anything else to ask regarding this matter, please comment. Our team will respond with a solution at their earliest convenience.


Ten years of experience in information and computer technology. Passionate about electronic devices, smartphones, computers, and modern technology.

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