When it comes to using your PC, everyone wants theirs to be at its most efficient and operating without any glitches. Sometimes we encounter software, programs, or files that are corrupt and illegitimate. It’s important to know what type of file you’re dealing with before you download it to your computer. With the Rundll32.exe file, you need to determine whether or not it’s safe on your computer. Is it legit or is it Spyware? Let’s discuss what the Rundll32.exe file is, and how you can find out if your PC is safe.

What is RunDLL32.exe

The Rundll32.exe program is part of Windows, and is used to run program code in DLL files as if they were within the actual program. The rundll32.exe file is located in the folder C:\Windows\System32. The rundll32.exe process is responsible for running DLLs and placing its libraries in the memory. The rundll32.exe process is known as a command line utility program, and it performs its embedded functions along with the rundll.exe file. Rundll32.exe works by using a function that is exported from a specific 16-bit or 32-bit DLL module. However, the only DLLs that you can call with the rundll.exe and rundll32.exe files are the ones that are only specified to be accessed by these processes.

When is Rundll32.exe not Safe?

Some malicious programs will try to use Rundll32.exe as a front, making you believe the file is legitimate when really it's not. To this extent Rundll32.exe is a process that may be registered as a Trojan Horse or a backdoor vulnerability.  This is a kind of Spyware that works to open a port (a backdoor) to some remote hacker or adware server.  The only way to find out if your version of Rundll32 is for real it to use a good, accredited Malware Scanner, many of which are available online. Here's what to look for in a reputable Malware Scanner

• The scanner has to have a stable website and download; make sure that the scanner you choose isn't posted on a temporary site


• The scanner has to be accredited.  Make sure that it is verified by third-party sources to be safe


• The scanner has to be accurate.  Don't trust a scanner that tries to purposely scare you.  It's job is to show you what infections may be on your computer, not to frighten you.


• The scanner has to be realistic.  If it isn't easy to use then it won't work.

The RunDLL32.exe Error

Even the real RunDLL32.exe program is prone to errors.  Improperly deleting registry entries, downloading doubtful files or a hard shutdown of your PC can also cause Rundll32.exe to malfunction, resulting in an error message. As with the Malware threat, the best way to assess your system for registry and download errors is to use an accredited scanner. These tools work by analyzing command codes and seeking out errors. 

Since 94% of computers have corrupt, unused, and possibly harmful files, it is important to perform regular scans of your PC in all regards.  Unfortunately, Windows does not come with any specific tool that you can use to clean and repair the registry. You can use the Registry Editor to perform a few simple edits. Many registry cleaner tools are available today that you can download and configure on your system to perform registry maintenance.

Here's what to look for in a reputable scanner:

• Registry tools should be GUI-based and have a user-friendly interface that makes them quite simple to use.

• The tools should use advanced algorithms to perform a thorough scan of your registry, and sift through the errors that may exist deep within the registry.

• The options in these tools are easy-to-use and you can start and perform a thorough registry scan just by clicking your mouse button a few times.

PC problems can be a terrible inconvenience. You can see how many problems can occur with the Rundll.exe file. It’s important to know if your file is legitimate, corrupt, or is being used as Spyware. A healthy registry is important to maintain an error-free, high-performance PC.