Rundll32.exe

The rundll32.exe file runs and distributes various DLL libraries within the memory of the file system. This process is considered a command line application and runs the core functions within the file itself. The file has two versions – a 16-bit and a 32-bit DLL file. Depending on the operating system and the file installation, you will notice either a rundll.exe or a rundll32.exe file on your system. Either one is capable of experiencing similar errors as mentioned here.

File name: Rundll32.exe
Application: Windows
Publisher: Microsoft
Rating: 5 stars based on 479 votes
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How To Fix The Rundll32.exe Error

Follow these simple steps:

  1. Place your Windows CD into your CD-ROM drive.
  2. Click on the Windows icon and type in the search bar.
  3. Type expand D:\i386\rundll32.ex_ c:\windows\system32\rundll32.exe in the Open box, assuming D is the letter of your CD-ROM drive.
  4. Restart your computer.

Possible causes of Rundll32.exe errors

These errors are frequently caused by conflicts with the file or installation profile, misuse of the file or respective directories, or a malicious attack on the system.

  • When conflicts arise on the profile or with the file, the application may be unable to transmit data between the necessary files.
  • When a file or directory is misused or damaged, the application as a whole may be unable to load.
  • Malicious attacks or infections on the system may render the entire system frozen or unable to perform any necessary computing functions.
Regardless of the cause, determining the best solution should be the first action step when noticing any system-related computer errors.

Is Rundll32.exe a dangerous file (virus, malware, spyware)?

In most cases, the file is considered to be safe. However, files do become corrupt at times and some malicious files are disguised to represent known, secure system files. When that happens, they can be very difficult to detect and remove, but using a comprehensive system scan usually detects them and allows you to safely remove them.

Known Rundll32.exe error messages

Rundll32.exe error

Common error messages users may see include:

  • File not found: Rundll32.exe
  • Cannot find file: Rundll32.exe
  • Device not recognized missing Rundll32.exe file
As the file is associated with USB connections to the computer, a keyboard, mouse, or other piece of hardware connected to the machine through a USB cable may be causing the error or may be unable to function properly due to the error.

Should I stop the Rundll32.exe task or process within the Task Manager?

Unless you have experience managing the processes and tasks on your machine, it is best to allow a system scanner or registry scanner to handle those tasks. Many of the tasks are required for performing specific operations on your machine and removing them may cause your program or entire computer to malfunction or reboot.

Should I download a new copy of the Rundll32.exe file?

The only time you should ever download a new version of a system file is when it comes through an application update or from the publisher directly. Be very cautious when downloading system files from third-party websites as they may contain additional software that you would install without knowing. This could cause an even larger issue than the error you are getting from this file!
WARNING: If you already downloaded a new file from an external site,
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Best way to fix Rundll32.exe errors

When these errors occur, verify if any new hardware or software has been added. If so, simply removing the new hardware or software may resolve the issue. If not, follow the steps below.

  1. Scan for any driver updates for new equipment. If new equipment or programs have been loaded, they may require updated drivers. Download new, secure drivers and perform a clean system restart.
  2. Download and install updates for the operating system. Regardless of the operating system version you are using, it is always considered good practice to install the latest security updates.
  3. Use anti-virus and anti-malware applications. Most virus scanners will protect your machine from basic threats. To increase your protection, use a malware scanner as well.
If the above steps fail to resolve the issue, it may be due to outdated hardware or software.

More information about Rundll32.exe

Another common process associated with rundll32 is the btmshellex.dll file. It executes a process commonly known as btmshellex and is found in Windows Explorer. By default, the process runs when the computer starts and is added to the main registry. It is associated with Bluetooth devices and is published by Motorola. It creates a central framework for the .NET runtime.

One error users are experiencing on both Windows 7 and Windows 8 devices is the logilda error. The file causing this error is LogiLDA.dll and is associated with various Logitech hardware items, including optical mice. These errors sometimes display on system boot and can be difficult to remove. One solution a user noted is to plug the USB mouse into a different USB slot in your computer, perform the full install, and reboot your system. This may solve the issue with the LogiLDA.dll file.

Many users never witness errors with this file. Because of that, it has been a target for some malicious activity. One such case is a file named "rundii32.exe". While the name here has two lowercase letter "i" characters, the malicious files will contain capital "I" letters which look dangerously similar to a lowercase "L" in many fonts. Be careful if you notice any suspicious files on your system. As always, if you notice high disk usage with any file on your computer, it may be advisable to reboot your system.

Another reason to be on the lookout if you are experiencing errors with this file is that it can impact other system files as well. One of the files that may be impacted by a virus or malware attack is msmpeng.exe. If you notice errors with either file, be sure to remedy them as quickly as possible.

 



Lead Editor (Bio)

Allen Quinn, Editor
Hey everyone, Allen here. I've been involved in tech support roles for more than 15 years and understand the pains and frustrations associated with broken computers. It's my goal to provide you with the help and knowledge you need to get and keep your computer in working order.

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